13dcf5451SChristoph Hellwig /* 23dcf5451SChristoph Hellwig * ext4.h 33dcf5451SChristoph Hellwig * 43dcf5451SChristoph Hellwig * Copyright (C) 1992, 1993, 1994, 1995 53dcf5451SChristoph Hellwig * Remy Card (card@masi.ibp.fr) 63dcf5451SChristoph Hellwig * Laboratoire MASI - Institut Blaise Pascal 73dcf5451SChristoph Hellwig * Universite Pierre et Marie Curie (Paris VI) 83dcf5451SChristoph Hellwig * 93dcf5451SChristoph Hellwig * from 103dcf5451SChristoph Hellwig * 113dcf5451SChristoph Hellwig * linux/include/linux/minix_fs.h 123dcf5451SChristoph Hellwig * 133dcf5451SChristoph Hellwig * Copyright (C) 1991, 1992 Linus Torvalds 143dcf5451SChristoph Hellwig */ 153dcf5451SChristoph Hellwig 163dcf5451SChristoph Hellwig #ifndef _EXT4_H 173dcf5451SChristoph Hellwig #define _EXT4_H 183dcf5451SChristoph Hellwig 193dcf5451SChristoph Hellwig #include <linux/types.h> 203dcf5451SChristoph Hellwig #include <linux/blkdev.h> 213dcf5451SChristoph Hellwig #include <linux/magic.h> 222ccb5fb9SAneesh Kumar K.V #include <linux/jbd2.h> 2360e58e0fSMingming Cao #include <linux/quota.h> 24d444c3c3STheodore Ts'o #include <linux/rwsem.h> 25d444c3c3STheodore Ts'o #include <linux/rbtree.h> 26d444c3c3STheodore Ts'o #include <linux/seqlock.h> 27d444c3c3STheodore Ts'o #include <linux/mutex.h> 28ca0faba0STheodore Ts'o #include <linux/timer.h> 29a4dad1aeSDavid Turner #include <linux/version.h> 30ca0faba0STheodore Ts'o #include <linux/wait.h> 31174cd4b1SIngo Molnar #include <linux/sched/signal.h> 32ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 33ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 34efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 350441984aSDarrick J. Wong #include <crypto/hash.h> 3646f47e48SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 3746f47e48SEric Biggers #include <linux/fscrypt_supp.h> 3846f47e48SEric Biggers #else 3946f47e48SEric Biggers #include <linux/fscrypt_notsupp.h> 4046f47e48SEric Biggers #endif 41a633f5a3SLukas Czerner #include <linux/falloc.h> 42c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 434d92dc0fSBen Hutchings #ifdef __KERNEL__ 444d92dc0fSBen Hutchings #include <linux/compat.h> 454d92dc0fSBen Hutchings #endif 463dcf5451SChristoph Hellwig 473dcf5451SChristoph Hellwig /* 488a35694eSShen Feng * The fourth extended filesystem constants/structures 493dcf5451SChristoph Hellwig */ 503dcf5451SChristoph Hellwig 513dcf5451SChristoph Hellwig /* 52a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 53a2821e34SAihua Zhang * structures. these checks slow things down a lot 54a2821e34SAihua Zhang */ 55a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 56a2821e34SAihua Zhang 57a2821e34SAihua Zhang /* 58a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 59a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 60a2821e34SAihua Zhang */ 61a2821e34SAihua Zhang #define DOUBLE_CHECK__ 62a2821e34SAihua Zhang 63a2821e34SAihua Zhang /* 643dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 653dcf5451SChristoph Hellwig */ 663dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig /* 693dcf5451SChristoph Hellwig * Debug code 703dcf5451SChristoph Hellwig */ 713dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 723dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 733dcf5451SChristoph Hellwig do { \ 743dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 754db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 763dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 773dcf5451SChristoph Hellwig } while (0) 783dcf5451SChristoph Hellwig #else 79ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 803dcf5451SChristoph Hellwig #endif 813dcf5451SChristoph Hellwig 824a092d73STheodore Ts'o /* 834a092d73STheodore Ts'o * Turn on EXT_DEBUG to get lots of info about extents operations. 844a092d73STheodore Ts'o */ 854a092d73STheodore Ts'o #define EXT_DEBUG__ 864a092d73STheodore Ts'o #ifdef EXT_DEBUG 874a092d73STheodore Ts'o #define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) 884a092d73STheodore Ts'o #else 894a092d73STheodore Ts'o #define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 904a092d73STheodore Ts'o #endif 914a092d73STheodore Ts'o 92d444c3c3STheodore Ts'o /* data type for block offset of block group */ 93d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 94d444c3c3STheodore Ts'o 95d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 96d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 97d444c3c3STheodore Ts'o 98d444c3c3STheodore Ts'o /* data type for file logical block number */ 99d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 100d444c3c3STheodore Ts'o 101d444c3c3STheodore Ts'o /* data type for block group number */ 102d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 103d444c3c3STheodore Ts'o 104331573feSNamjae Jeon enum SHIFT_DIRECTION { 105331573feSNamjae Jeon SHIFT_LEFT = 0, 106331573feSNamjae Jeon SHIFT_RIGHT, 107331573feSNamjae Jeon }; 108331573feSNamjae Jeon 109296c355cSTheodore Ts'o /* 110296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 111296c355cSTheodore Ts'o * 112296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 113296c355cSTheodore Ts'o * flag field is exported via the traceport interface 114296c355cSTheodore Ts'o */ 115d444c3c3STheodore Ts'o 1163dcf5451SChristoph Hellwig /* prefer goal again. length */ 1170ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1183dcf5451SChristoph Hellwig /* blocks already reserved */ 1190ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1203dcf5451SChristoph Hellwig /* metadata is being allocated */ 1210ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1223dcf5451SChristoph Hellwig /* first blocks in the file */ 1230ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1243dcf5451SChristoph Hellwig /* search for the best chunk */ 1250ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1263dcf5451SChristoph Hellwig /* data is being allocated */ 1270ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1283dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1290ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1303dcf5451SChristoph Hellwig /* allocate for locality group */ 1310ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1323dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1330ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1343dcf5451SChristoph Hellwig /* goal is meaningful */ 1350ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 136d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1370ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1384ba74d00STheodore Ts'o /* We are doing stream allocation */ 1394ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 14055f020dbSAllison Henderson /* Use reserved root blocks if needed */ 14155f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 14227dd4385SLukas Czerner /* Use blocks from reserved pool */ 14327dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 1443dcf5451SChristoph Hellwig 1453dcf5451SChristoph Hellwig struct ext4_allocation_request { 1463dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1473dcf5451SChristoph Hellwig struct inode *inode; 1483dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 149498e5f24STheodore Ts'o unsigned int len; 150726447d8SEric Sandeen /* logical block in target inode */ 151726447d8SEric Sandeen ext4_lblk_t logical; 152726447d8SEric Sandeen /* the closest logical allocated block to the left */ 153726447d8SEric Sandeen ext4_lblk_t lleft; 154726447d8SEric Sandeen /* the closest logical allocated block to the right */ 155726447d8SEric Sandeen ext4_lblk_t lright; 156726447d8SEric Sandeen /* phys. target (a hint) */ 157726447d8SEric Sandeen ext4_fsblk_t goal; 158726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 159726447d8SEric Sandeen ext4_fsblk_t pleft; 160726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 161726447d8SEric Sandeen ext4_fsblk_t pright; 1623dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 163498e5f24STheodore Ts'o unsigned int flags; 1643dcf5451SChristoph Hellwig }; 1653dcf5451SChristoph Hellwig 1663dcf5451SChristoph Hellwig /* 167e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 168e35fd660STheodore Ts'o * 169e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 170e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 171e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 172e35fd660STheodore Ts'o */ 173e35fd660STheodore Ts'o #define EXT4_MAP_NEW (1 << BH_New) 174e35fd660STheodore Ts'o #define EXT4_MAP_MAPPED (1 << BH_Mapped) 175e35fd660STheodore Ts'o #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) 176e35fd660STheodore Ts'o #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) 177e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 178cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 179e35fd660STheodore Ts'o 180e35fd660STheodore Ts'o struct ext4_map_blocks { 181e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 182e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 183e35fd660STheodore Ts'o unsigned int m_len; 184e35fd660STheodore Ts'o unsigned int m_flags; 185e35fd660STheodore Ts'o }; 186e35fd660STheodore Ts'o 187e35fd660STheodore Ts'o /* 188bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 189bd2d0210STheodore Ts'o */ 190bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 191bd2d0210STheodore Ts'o 1924188188bSCurt Wohlgemuth /* 193556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 1946b523df4SJan Kara * buffered writeback. 1954188188bSCurt Wohlgemuth */ 1960031462bSMingming Cao typedef struct ext4_io_end { 1975b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 1986b523df4SJan Kara handle_t *handle; /* handle reserved for extent 1996b523df4SJan Kara * conversion */ 2000031462bSMingming Cao struct inode *inode; /* file being written to */ 201b0857d30SJan Kara struct bio *bio; /* Linked list of completed 202b0857d30SJan Kara * bios covering the extent */ 2038d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 2043bd6ad7bSJan Kara atomic_t count; /* reference counter */ 205a1de02dcSEric Sandeen loff_t offset; /* offset in the file */ 206a1de02dcSEric Sandeen ssize_t size; /* size of the extent */ 2070031462bSMingming Cao } ext4_io_end_t; 2080031462bSMingming Cao 209bd2d0210STheodore Ts'o struct ext4_io_submit { 2105a33911fSTejun Heo struct writeback_control *io_wbc; 211bd2d0210STheodore Ts'o struct bio *io_bio; 212bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 213bd2d0210STheodore Ts'o sector_t io_next_block; 214bd2d0210STheodore Ts'o }; 215bd2d0210STheodore Ts'o 216b3a3ca8cSTheodore Ts'o /* 2173dcf5451SChristoph Hellwig * Special inodes numbers 2183dcf5451SChristoph Hellwig */ 2193dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2203dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 221ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 222ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2233dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2243dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2253dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2263dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2273dcf5451SChristoph Hellwig 2283dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2293dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2303dcf5451SChristoph Hellwig 2313dcf5451SChristoph Hellwig /* 2323dcf5451SChristoph Hellwig * Maximal count of links to a file 2333dcf5451SChristoph Hellwig */ 2343dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2353dcf5451SChristoph Hellwig 2363dcf5451SChristoph Hellwig /* 2373dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2383dcf5451SChristoph Hellwig */ 2393dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2403dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2413dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 242fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2439e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2443dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2453dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2463dcf5451SChristoph Hellwig #else 2473dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2483dcf5451SChristoph Hellwig #endif 2493dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 250281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 251281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2523dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2533dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 254281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2553dcf5451SChristoph Hellwig #else 2563dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2573dcf5451SChristoph Hellwig #endif 2583dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2593dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2603dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2613dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 2623dcf5451SChristoph Hellwig #else 2633dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2643dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 2653dcf5451SChristoph Hellwig (s)->s_inode_size) 2663dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2673dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 2683dcf5451SChristoph Hellwig (s)->s_first_ino) 2693dcf5451SChristoph Hellwig #endif 2703dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 271518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 272518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 273518eaa63SFabian Frederick blkbits)) 2743dcf5451SChristoph Hellwig 275d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 276d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 277d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 278d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 279d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 280d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 281d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 282f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 283f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 284f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 285f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 286f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 287f5a44db5STheodore Ts'o /* Get the cluster offset */ 288f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 289f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 290f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 291f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 292d5b8f310STheodore Ts'o 2933dcf5451SChristoph Hellwig /* 2943dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 2953dcf5451SChristoph Hellwig */ 2963dcf5451SChristoph Hellwig struct ext4_group_desc 2973dcf5451SChristoph Hellwig { 2983dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 2993dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3003dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 301560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 302560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 303560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3043dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 305e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 306e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 307e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 308560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3093dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3103dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3113dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3123dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3133dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3143dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3153dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3163dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 317e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 318e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 319e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 320e6153918SDarrick J. Wong __u32 bg_reserved; 3213dcf5451SChristoph Hellwig }; 3223dcf5451SChristoph Hellwig 32341a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 32441a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 32541a246d1SDarrick J. Wong sizeof(__le16)) 32641a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 32741a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 32841a246d1SDarrick J. Wong sizeof(__le16)) 32941a246d1SDarrick J. Wong 330772cb7c8SJose R. Santos /* 331772cb7c8SJose R. Santos * Structure of a flex block group info 332772cb7c8SJose R. Santos */ 333772cb7c8SJose R. Santos 334772cb7c8SJose R. Santos struct flex_groups { 33590ba983fSTheodore Ts'o atomic64_t free_clusters; 3369f24e420STheodore Ts'o atomic_t free_inodes; 3377d39db14STheodore Ts'o atomic_t used_dirs; 338772cb7c8SJose R. Santos }; 339772cb7c8SJose R. Santos 3403dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3413dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3423dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3433dcf5451SChristoph Hellwig 3443dcf5451SChristoph Hellwig /* 3453dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3463dcf5451SChristoph Hellwig */ 3473dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3483dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3493dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3503dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3513dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3523dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 353281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3543dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3553dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3563dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3573dcf5451SChristoph Hellwig #else 3583dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 3593dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 3603dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 3613dcf5451SChristoph Hellwig #endif 3623dcf5451SChristoph Hellwig 3633dcf5451SChristoph Hellwig /* 3643dcf5451SChristoph Hellwig * Constants relative to the data blocks 3653dcf5451SChristoph Hellwig */ 3663dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 3673dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 3683dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 3693dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 3703dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 3713dcf5451SChristoph Hellwig 3723dcf5451SChristoph Hellwig /* 3733dcf5451SChristoph Hellwig * Inode flags 3743dcf5451SChristoph Hellwig */ 3753dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 3763dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 3773dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 3783dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 3793dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 3803dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 3813dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 3823dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 3833dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 3843dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 3853dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 3863dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 3873edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 3883edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 3893dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 3903dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 3913dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 3923dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 3933dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 3943dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 3953dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 3963dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 3973dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 398f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 399c8d46e41SJiaying Zhang #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 40067cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4018b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 4023dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4033dcf5451SChristoph Hellwig 404040cb378SLi Xi #define EXT4_FL_USER_VISIBLE 0x304BDFFF /* User visible flags */ 405f8011d93SJan Kara #define EXT4_FL_USER_MODIFIABLE 0x204BC0FF /* User modifiable flags */ 4063dcf5451SChristoph Hellwig 407d14e7683SJan Kara /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */ 4089b7365fcSLi Xi #define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \ 4099b7365fcSLi Xi EXT4_IMMUTABLE_FL | \ 4109b7365fcSLi Xi EXT4_APPEND_FL | \ 4119b7365fcSLi Xi EXT4_NODUMP_FL | \ 4129b7365fcSLi Xi EXT4_NOATIME_FL | \ 4139b7365fcSLi Xi EXT4_PROJINHERIT_FL) 4149b7365fcSLi Xi 4158fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4168fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4171cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4188fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 419040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 420040cb378SLi Xi EXT4_PROJINHERIT_FL) 4218fa43a81SDuane Griffin 4222dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4232dc6b0d4SDuane Griffin #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) 4242dc6b0d4SDuane Griffin 4252dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4262dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4272dc6b0d4SDuane Griffin 4282dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 4292dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 4302dc6b0d4SDuane Griffin { 4312dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 4322dc6b0d4SDuane Griffin return flags; 4332dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 4342dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 4352dc6b0d4SDuane Griffin else 4362dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 4372dc6b0d4SDuane Griffin } 4382dc6b0d4SDuane Griffin 43912e9b892SDmitry Monakhov /* 44012e9b892SDmitry Monakhov * Inode flags used for atomic set/get 44112e9b892SDmitry Monakhov */ 44212e9b892SDmitry Monakhov enum { 44312e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 44412e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 44512e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 44612e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 44712e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 44812e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 44912e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 45012e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 45112e9b892SDmitry Monakhov /* Reserved for compression usage... */ 45212e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 45312e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 45412e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 455f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 45612e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 45712e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 45812e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 45912e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 46012e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 46112e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 46212e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 46312e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 46412e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 46512e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 46612e9b892SDmitry Monakhov EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ 46767cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 4688b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 46912e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 47012e9b892SDmitry Monakhov }; 47112e9b892SDmitry Monakhov 47212e9b892SDmitry Monakhov /* 4739a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 4749a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 4759a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 4769a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 4779a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 4789a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 4799a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 4809a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 4819a4c8019SCarlos Maiolino * defined in e2fsprogs. 48212e9b892SDmitry Monakhov * 48312e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 48412e9b892SDmitry Monakhov */ 4859a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 4869a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 4879a4c8019SCarlos Maiolino 48812e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 48912e9b892SDmitry Monakhov { 49012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 49112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 49212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 49312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 49412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 49512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 49612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 49712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 49812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 49912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 50012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5013edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 50212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 50312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 50412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 50512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 50612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 50712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 50812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 50912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 51012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 51112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EOFBLOCKS); 51267cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5138b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 51412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 51512e9b892SDmitry Monakhov } 51612e9b892SDmitry Monakhov 5173dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5183dcf5451SChristoph Hellwig struct ext4_new_group_input { 5193dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5203dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5213dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 5223dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 5233dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 5243dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 5253dcf5451SChristoph Hellwig __u16 unused; 5263dcf5451SChristoph Hellwig }; 5273dcf5451SChristoph Hellwig 5284d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 5294d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 5304d92dc0fSBen Hutchings u32 group; 5314d92dc0fSBen Hutchings compat_u64 block_bitmap; 5324d92dc0fSBen Hutchings compat_u64 inode_bitmap; 5334d92dc0fSBen Hutchings compat_u64 inode_table; 5344d92dc0fSBen Hutchings u32 blocks_count; 5354d92dc0fSBen Hutchings u16 reserved_blocks; 5364d92dc0fSBen Hutchings u16 unused; 5374d92dc0fSBen Hutchings }; 5384d92dc0fSBen Hutchings #endif 5394d92dc0fSBen Hutchings 5403dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 5413dcf5451SChristoph Hellwig struct ext4_new_group_data { 5423dcf5451SChristoph Hellwig __u32 group; 5433dcf5451SChristoph Hellwig __u64 block_bitmap; 5443dcf5451SChristoph Hellwig __u64 inode_bitmap; 5453dcf5451SChristoph Hellwig __u64 inode_table; 5463dcf5451SChristoph Hellwig __u32 blocks_count; 5473dcf5451SChristoph Hellwig __u16 reserved_blocks; 548d77147ffSharshads __u16 mdata_blocks; 549d77147ffSharshads __u32 free_clusters_count; 5503dcf5451SChristoph Hellwig }; 5513dcf5451SChristoph Hellwig 55233afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 55333afdcc5SYongqiang Yang enum { 55433afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 55533afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 55633afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 55733afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 55833afdcc5SYongqiang Yang }; 55933afdcc5SYongqiang Yang 5603dcf5451SChristoph Hellwig /* 56179e83036SEric Sandeen * Flags used by ext4_map_blocks() 5623dcf5451SChristoph Hellwig */ 563556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 564c2177057STheodore Ts'o extent to be an initialized ext4 */ 5652ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 566556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 567556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 568556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 569c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 57027dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 57127dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 57203f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 5730031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 574556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 5750031462bSMingming Cao extent if blocks has been preallocated already*/ 576c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 5771296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 578c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 579556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 580c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 581c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 582556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 58327dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 58427dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 58527dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 586556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 587556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 588a4e5d88bSDmitry Monakhov /* Request will not result in inode size update (user for fallocate) */ 589a4e5d88bSDmitry Monakhov #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 590b8a86845SLukas Czerner /* Convert written extents to unwritten */ 5912dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 592c86d8db3SJan Kara /* Write zeros to newly created written extents */ 593c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 594c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 595c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 596ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 597ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 598ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 5993dcf5451SChristoph Hellwig 6003dcf5451SChristoph Hellwig /* 6017869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 602ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 603107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6047869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6057869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6067869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6077869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 608107a7bd3STheodore Ts'o */ 609d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 610d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 611107a7bd3STheodore Ts'o 612107a7bd3STheodore Ts'o /* 613e6362609STheodore Ts'o * Flags used by ext4_free_blocks 614e6362609STheodore Ts'o */ 615e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 616e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6171f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6187132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 61984130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 62084130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 621e6362609STheodore Ts'o 622e6362609STheodore Ts'o /* 6233dcf5451SChristoph Hellwig * ioctl commands 6243dcf5451SChristoph Hellwig */ 6253dcf5451SChristoph Hellwig #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS 6263dcf5451SChristoph Hellwig #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS 6273dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 6283dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 6293dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 6303dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 6313dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 6323dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 6338eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 6348eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 6358eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 636ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 6378eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 638ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 639748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 64019c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 641393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 6427869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 643a7550b30SJaegeuk Kim #define EXT4_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY 644a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT 645a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY 6463dcf5451SChristoph Hellwig 6479b7365fcSLi Xi #define EXT4_IOC_FSGETXATTR FS_IOC_FSGETXATTR 6489b7365fcSLi Xi #define EXT4_IOC_FSSETXATTR FS_IOC_FSSETXATTR 6499b7365fcSLi Xi 650e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 651783d9485STheodore Ts'o 652783d9485STheodore Ts'o /* 653783d9485STheodore Ts'o * Flags for going down operation 654783d9485STheodore Ts'o */ 655783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 656783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 657783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 658783d9485STheodore Ts'o 659783d9485STheodore Ts'o 660899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6613dcf5451SChristoph Hellwig /* 6623dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 6633dcf5451SChristoph Hellwig */ 6643dcf5451SChristoph Hellwig #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS 6653dcf5451SChristoph Hellwig #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS 6663dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 6673dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 6683dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 6693dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 6703dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 6714d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 6723dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 6733dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 674899ad0ceSBen Hutchings #endif 6753dcf5451SChristoph Hellwig 676b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 677fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 678fb0a387dSEric Sandeen 6793dcf5451SChristoph Hellwig /* 6803dcf5451SChristoph Hellwig * Structure of an inode on the disk 6813dcf5451SChristoph Hellwig */ 6823dcf5451SChristoph Hellwig struct ext4_inode { 6833dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 6843dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 6853dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 6863dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 6873dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 6883dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 6893dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 6903dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 6913dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 6923dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 6933dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 6943dcf5451SChristoph Hellwig union { 6953dcf5451SChristoph Hellwig struct { 6963dcf5451SChristoph Hellwig __le32 l_i_version; 6973dcf5451SChristoph Hellwig } linux1; 6983dcf5451SChristoph Hellwig struct { 6993dcf5451SChristoph Hellwig __u32 h_i_translator; 7003dcf5451SChristoph Hellwig } hurd1; 7013dcf5451SChristoph Hellwig struct { 7023dcf5451SChristoph Hellwig __u32 m_i_reserved1; 7033dcf5451SChristoph Hellwig } masix1; 7043dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 7053dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 7063dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 7073dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 7083dcf5451SChristoph Hellwig __le32 i_size_high; 7093dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 7103dcf5451SChristoph Hellwig union { 7113dcf5451SChristoph Hellwig struct { 7123dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 7133dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 7143dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 7153dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 716e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 717e6153918SDarrick J. Wong __le16 l_i_reserved; 7183dcf5451SChristoph Hellwig } linux2; 7193dcf5451SChristoph Hellwig struct { 7203dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7213dcf5451SChristoph Hellwig __u16 h_i_mode_high; 7223dcf5451SChristoph Hellwig __u16 h_i_uid_high; 7233dcf5451SChristoph Hellwig __u16 h_i_gid_high; 7243dcf5451SChristoph Hellwig __u32 h_i_author; 7253dcf5451SChristoph Hellwig } hurd2; 7263dcf5451SChristoph Hellwig struct { 7273dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7283dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 7293dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 7303dcf5451SChristoph Hellwig } masix2; 7313dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 7323dcf5451SChristoph Hellwig __le16 i_extra_isize; 733e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 7343dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 7353dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 7363dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 7373dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 7383dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 7393dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 7408b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 7413dcf5451SChristoph Hellwig }; 7423dcf5451SChristoph Hellwig 743748de673SAkira Fujita struct move_extent { 744748de673SAkira Fujita __u32 reserved; /* should be zero */ 745748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 746748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 747748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 748748de673SAkira Fujita __u64 len; /* block length to be moved */ 749748de673SAkira Fujita __u64 moved_len; /* moved block length */ 750748de673SAkira Fujita }; 7513dcf5451SChristoph Hellwig 7523dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 7533dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 7543dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 7553dcf5451SChristoph Hellwig 7563dcf5451SChristoph Hellwig /* 7573dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 7583dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 7593dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 7603dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 7613dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 7623dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 7633dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 7643dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 7653dcf5451SChristoph Hellwig */ 7663dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 7673dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 7683dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 7693dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 7703dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 7713dcf5451SChristoph Hellwig 772a4dad1aeSDavid Turner /* 773a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 774a4dad1aeSDavid Turner * 775a4dad1aeSDavid Turner * extra msb of adjust for signed 776a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 777a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 778a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 779a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 780a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 781a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 782a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 783a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 784a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 785a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 786a4dad1aeSDavid Turner * 787a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 788a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 789a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 790a4dad1aeSDavid Turner * affected filesystem before 2242. 791a4dad1aeSDavid Turner */ 792a4dad1aeSDavid Turner 7933dcf5451SChristoph Hellwig static inline __le32 ext4_encode_extra_time(struct timespec *time) 7943dcf5451SChristoph Hellwig { 795a4dad1aeSDavid Turner u32 extra = sizeof(time->tv_sec) > 4 ? 796a4dad1aeSDavid Turner ((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK : 0; 797a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 7983dcf5451SChristoph Hellwig } 7993dcf5451SChristoph Hellwig 8003dcf5451SChristoph Hellwig static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) 8013dcf5451SChristoph Hellwig { 802a4dad1aeSDavid Turner if (unlikely(sizeof(time->tv_sec) > 4 && 803a4dad1aeSDavid Turner (extra & cpu_to_le32(EXT4_EPOCH_MASK)))) { 804eaa093d2SChristoph Hellwig 805eaa093d2SChristoph Hellwig #if 1 806a4dad1aeSDavid Turner /* Handle legacy encoding of pre-1970 dates with epoch 807eaa093d2SChristoph Hellwig * bits 1,1. (This backwards compatibility may be removed 808eaa093d2SChristoph Hellwig * at the discretion of the ext4 developers.) 809a4dad1aeSDavid Turner */ 810a4dad1aeSDavid Turner u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; 811a4dad1aeSDavid Turner if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) 812a4dad1aeSDavid Turner extra_bits = 0; 813a4dad1aeSDavid Turner time->tv_sec += extra_bits << 32; 814a4dad1aeSDavid Turner #else 815a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 816a4dad1aeSDavid Turner #endif 817a4dad1aeSDavid Turner } 818c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 8193dcf5451SChristoph Hellwig } 8203dcf5451SChristoph Hellwig 8213dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 8223dcf5451SChristoph Hellwig do { \ 8233dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 8243dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8253dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8263dcf5451SChristoph Hellwig ext4_encode_extra_time(&(inode)->xtime); \ 8273dcf5451SChristoph Hellwig } while (0) 8283dcf5451SChristoph Hellwig 8293dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 8303dcf5451SChristoph Hellwig do { \ 8313dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8323dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 8333dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8343dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8353dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 8363dcf5451SChristoph Hellwig } while (0) 8373dcf5451SChristoph Hellwig 8383dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 8393dcf5451SChristoph Hellwig do { \ 8403dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 8413dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8423dcf5451SChristoph Hellwig ext4_decode_extra_time(&(inode)->xtime, \ 8433dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 844af0b44a1SEric Sandeen else \ 845af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 8463dcf5451SChristoph Hellwig } while (0) 8473dcf5451SChristoph Hellwig 8483dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 8493dcf5451SChristoph Hellwig do { \ 8503dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8513dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 8523dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 85319ea8060STheodore Ts'o else \ 85419ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 8553dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8563dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 8573dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 858af0b44a1SEric Sandeen else \ 859af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 8603dcf5451SChristoph Hellwig } while (0) 8613dcf5451SChristoph Hellwig 8623dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 8633dcf5451SChristoph Hellwig 8643dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 8653dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 8663dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 8673dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 8683dcf5451SChristoph Hellwig #define i_uid_low i_uid 8693dcf5451SChristoph Hellwig #define i_gid_low i_gid 8703dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 8713dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 872e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 8733dcf5451SChristoph Hellwig 8743dcf5451SChristoph Hellwig #elif defined(__GNU__) 8753dcf5451SChristoph Hellwig 8763dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 8773dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 8783dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 8793dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 8803dcf5451SChristoph Hellwig 8813dcf5451SChristoph Hellwig #elif defined(__masix__) 8823dcf5451SChristoph Hellwig 8833dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 8843dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 8853dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 8863dcf5451SChristoph Hellwig 8873dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 8883dcf5451SChristoph Hellwig 889c0677e6dSZheng Liu #include "extents_status.h" 890c0677e6dSZheng Liu 891d444c3c3STheodore Ts'o /* 892daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 893daf647d2STheodore Ts'o * 894daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 895daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 896daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 897daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 898daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 899daf647d2STheodore Ts'o * down...) 900daf647d2STheodore Ts'o * 901daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 902daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 903daf647d2STheodore Ts'o * where the second inode has larger inode number 904daf647d2STheodore Ts'o * than the first 905daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 906daf647d2STheodore Ts'o */ 907daf647d2STheodore Ts'o enum { 908daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 909daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 910daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 911daf647d2STheodore Ts'o }; 912daf647d2STheodore Ts'o 913daf647d2STheodore Ts'o 914daf647d2STheodore Ts'o /* 915d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 916d444c3c3STheodore Ts'o */ 917d444c3c3STheodore Ts'o struct ext4_inode_info { 918d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 919d444c3c3STheodore Ts'o __u32 i_dtime; 92012e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 921d444c3c3STheodore Ts'o 922d444c3c3STheodore Ts'o /* 923d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 924d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 925a627b0a7SEric Whitney * it is used for making block allocation decisions - we try to 926d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 927d444c3c3STheodore Ts'o * near to their parent directory's inode. 928d444c3c3STheodore Ts'o */ 929d444c3c3STheodore Ts'o ext4_group_t i_block_group; 9308a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 931353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 93219f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 933353eb83cSTheodore Ts'o #endif 93412e9b892SDmitry Monakhov unsigned long i_flags; 935d444c3c3STheodore Ts'o 936d444c3c3STheodore Ts'o /* 937d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 938d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 939d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 940d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 941d444c3c3STheodore Ts'o * EAs. 942d444c3c3STheodore Ts'o */ 943d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 944d444c3c3STheodore Ts'o 945d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 946d444c3c3STheodore Ts'o 947d444c3c3STheodore Ts'o /* 948d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 949d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 950d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 951d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 952d444c3c3STheodore Ts'o * 953d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 954d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 955d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 956d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 957d444c3c3STheodore Ts'o * 958d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 959d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 960d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 961d444c3c3STheodore Ts'o */ 962d444c3c3STheodore Ts'o loff_t i_disksize; 963d444c3c3STheodore Ts'o 964d444c3c3STheodore Ts'o /* 965d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 966d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 967d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 968d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 969d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 970d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 971d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 972d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 973d444c3c3STheodore Ts'o */ 974d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 975ea3d7209SJan Kara /* 976ea3d7209SJan Kara * i_mmap_sem is for serializing page faults with truncate / punch hole 977ea3d7209SJan Kara * operations. We have to make sure that new page cannot be faulted in 978ea3d7209SJan Kara * a section of the inode that is being punched. We cannot easily use 979ea3d7209SJan Kara * i_data_sem for this since we need protection for the whole punch 980ea3d7209SJan Kara * operation and i_data_sem ranks below transaction start so we have 981ea3d7209SJan Kara * to occasionally drop it. 982ea3d7209SJan Kara */ 983ea3d7209SJan Kara struct rw_semaphore i_mmap_sem; 984d444c3c3STheodore Ts'o struct inode vfs_inode; 9858aefcd55STheodore Ts'o struct jbd2_inode *jinode; 986d444c3c3STheodore Ts'o 987202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 988202ee5dfSTheodore Ts'o 989d444c3c3STheodore Ts'o /* 990d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 991d444c3c3STheodore Ts'o * struct timespec i_{a,c,m}time in the generic inode. 992d444c3c3STheodore Ts'o */ 993d444c3c3STheodore Ts'o struct timespec i_crtime; 994d444c3c3STheodore Ts'o 995d444c3c3STheodore Ts'o /* mballoc */ 996d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 997d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 998d444c3c3STheodore Ts'o 999c0677e6dSZheng Liu /* extents status tree */ 1000c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1001c0677e6dSZheng Liu rwlock_t i_es_lock; 1002edaa53caSZheng Liu struct list_head i_es_list; 1003eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1004edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1005dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1006dd475925SJan Kara extents to shrink. Protected by 1007dd475925SJan Kara i_es_lock */ 1008c0677e6dSZheng Liu 1009d444c3c3STheodore Ts'o /* ialloc */ 1010d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1011d444c3c3STheodore Ts'o 1012d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 1013a627b0a7SEric Whitney /* In case of bigalloc, this refer to clusters rather than blocks */ 1014d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 101501f49d0bSTheodore Ts'o ext4_lblk_t i_da_metadata_calc_last_lblock; 10169d0be502STheodore Ts'o int i_da_metadata_calc_len; 1017d444c3c3STheodore Ts'o 1018d444c3c3STheodore Ts'o /* on-disk additional length */ 1019d444c3c3STheodore Ts'o __u16 i_extra_isize; 1020d444c3c3STheodore Ts'o 102167cf5b09STao Ma /* Indicate the inline data space. */ 102267cf5b09STao Ma u16 i_inline_off; 102367cf5b09STao Ma u16 i_inline_size; 102467cf5b09STao Ma 1025a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1026a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1027a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1028a9e7f447SDmitry Monakhov #endif 10298d5d02e6SMingming Cao 10302e8fa54eSJan Kara /* Lock protecting lists below */ 1031744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 10322e8fa54eSJan Kara /* 10332e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 10342e8fa54eSJan Kara * transaction reserved 10352e8fa54eSJan Kara */ 10362e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 10372e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1038600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 10398a2005d3STheodore Ts'o 10408a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1041b436b9beSJan Kara 1042b436b9beSJan Kara /* 1043b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1044b436b9beSJan Kara * fsync and fdatasync, respectively. 1045b436b9beSJan Kara */ 1046b436b9beSJan Kara tid_t i_sync_tid; 1047b436b9beSJan Kara tid_t i_datasync_tid; 1048814525f4SDarrick J. Wong 104996c7e0d9SJan Kara #ifdef CONFIG_QUOTA 105096c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 105196c7e0d9SJan Kara #endif 105296c7e0d9SJan Kara 1053814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1054814525f4SDarrick J. Wong __u32 i_csum_seed; 1055b30ab0e0SMichael Halcrow 1056040cb378SLi Xi kprojid_t i_projid; 1057d444c3c3STheodore Ts'o }; 1058d444c3c3STheodore Ts'o 1059d444c3c3STheodore Ts'o /* 10603dcf5451SChristoph Hellwig * File system states 10613dcf5451SChristoph Hellwig */ 10623dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 10633dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 10643dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 10653dcf5451SChristoph Hellwig 10663dcf5451SChristoph Hellwig /* 10673dcf5451SChristoph Hellwig * Misc. filesystem flags 10683dcf5451SChristoph Hellwig */ 10693dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 10703dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 10713dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 10723dcf5451SChristoph Hellwig 10733dcf5451SChristoph Hellwig /* 107468911009SLukas Czerner * Mount flags set via mount options or defaults 10753dcf5451SChristoph Hellwig */ 1076cdb7ee4cSTahsin Erdogan #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ 10773dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 10783dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 10793dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 10803dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 10813dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 108239ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 10833dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 10843dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1085923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1086923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ 1087923ae0ffSRoss Zwisler #else 1088923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0 1089923ae0ffSRoss Zwisler #endif 10903dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 10913dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 10923dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 10933dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 10943dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 10953dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 10963dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 10973dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1098afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 10993dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 110049da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 110149da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 110249da9392SJan Kara * enable enforcement for hidden 110349da9392SJan Kara * quota files */ 110449da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 110549da9392SJan Kara * enforcement for hidden quota 110649da9392SJan Kara * files */ 110749da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 110849da9392SJan Kara * enforcement */ 1109744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1110d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 11113dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 111264769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 11135bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 11146fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 11155328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1116bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 11175bf5683aSHidehiro Kawai 111868911009SLukas Czerner /* 111968911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 112068911009SLukas Czerner * based on per file system feature or property or in special cases such as 112168911009SLukas Czerner * distinguishing between explicit mount option definition and default. 112268911009SLukas Czerner */ 112356889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 112456889787STheodore Ts'o specified delalloc */ 112568911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 112668911009SLukas Czerner size of blocksize * 8 112768911009SLukas Czerner blocks */ 1128ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1129ed3654ebSTheodore Ts'o file systems */ 113056889787STheodore Ts'o 11311e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 11321e381f60SDmitry Monakhov specified journal checksum */ 11331e381f60SDmitry Monakhov 1134fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1135fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1136fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1137fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 11383dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 11393dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 11403dcf5451SChristoph Hellwig 1141a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1142a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1143a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1144a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1145a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1146a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1147a2595b8aSTheodore Ts'o 1148597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1149597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 11503dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1151597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1152597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 11533dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 115450e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 115550e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 115650e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 11573dcf5451SChristoph Hellwig 1158c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1159c3e94d1dSYongqiang Yang 11603dcf5451SChristoph Hellwig /* 11613dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 11623dcf5451SChristoph Hellwig */ 11633dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 11643dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 11653dcf5451SChristoph Hellwig 11663dcf5451SChristoph Hellwig /* 11673dcf5451SChristoph Hellwig * Behaviour when detecting errors 11683dcf5451SChristoph Hellwig */ 11693dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 11703dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 11713dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 11723dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 11733dcf5451SChristoph Hellwig 1174e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1175e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1176e6153918SDarrick J. Wong 11773dcf5451SChristoph Hellwig /* 11783dcf5451SChristoph Hellwig * Structure of the super block 11793dcf5451SChristoph Hellwig */ 11803dcf5451SChristoph Hellwig struct ext4_super_block { 11813dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 11823dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 11833dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 11843dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 11853dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 11863dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 11873dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1188281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 11893dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1190281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 11913dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 11923dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 11933dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 11943dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 11953dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 11963dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 11973dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 11983dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 11993dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 12003dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 12013dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 12023dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 12033dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 12043dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 12053dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 12063dcf5451SChristoph Hellwig /* 12073dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 12083dcf5451SChristoph Hellwig * 12093dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 12103dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 12113dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 12123dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 12133dcf5451SChristoph Hellwig * 12143dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 12153dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 12163dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 12173dcf5451SChristoph Hellwig * things it doesn't understand... 12183dcf5451SChristoph Hellwig */ 12193dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 12203dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 12213dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 12223dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 12233dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 12243dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 12253dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 12263dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 12273dcf5451SChristoph Hellwig /*88*/ char s_last_mounted[64]; /* directory where last mounted */ 12283dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 12293dcf5451SChristoph Hellwig /* 12303dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 12313dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 12323dcf5451SChristoph Hellwig */ 12333dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 12343dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 12353dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 12363dcf5451SChristoph Hellwig /* 12373dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 12383dcf5451SChristoph Hellwig */ 12393dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 12403dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 12413dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 12423dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 12433dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 12443dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 124589eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 12463dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 12473dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 12483dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 12493dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 12503dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 12513dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 12523dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 12533dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 12543dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 12553dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 12563dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 12573dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 12583dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1259c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 12603dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 12613dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1262772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1263e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1264f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1265f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1266afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 12674a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 12684a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 12694a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 12704a9cdec7STheodore Ts'o snapshot's future use */ 12714a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 12724a9cdec7STheodore Ts'o on-disk snapshot list */ 12731c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 12741c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 12751c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 12761c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 12771c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 12781c13d5c0STheodore Ts'o __u8 s_first_error_func[32]; /* function where the error happened */ 12791c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 12801c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 12811c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 12821c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 12831c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 12841c13d5c0STheodore Ts'o __u8 s_last_error_func[32]; /* function where the error happened */ 12858b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 12868b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1287281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1288281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1289281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 12901beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 12913edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1292f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1293f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 12948b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 12958c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 12968c81bd8fSDarrick J. Wong __le32 s_reserved[98]; /* Padding to the end of the block */ 1297e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 12983dcf5451SChristoph Hellwig }; 12993dcf5451SChristoph Hellwig 13001c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 13011c13d5c0STheodore Ts'o 13023dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1303bc0b0d6dSTheodore Ts'o 1304bc0b0d6dSTheodore Ts'o /* 13054ab2f15bSTheodore Ts'o * run-time mount flags 1306bc0b0d6dSTheodore Ts'o */ 1307bc0b0d6dSTheodore Ts'o #define EXT4_MF_MNTDIR_SAMPLED 0x0001 13084ab2f15bSTheodore Ts'o #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ 13096ddb2447STheodore Ts'o #define EXT4_MF_TEST_DUMMY_ENCRYPTION 0x0004 13106ddb2447STheodore Ts'o 13116ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 13126ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \ 13136ddb2447STheodore Ts'o EXT4_MF_TEST_DUMMY_ENCRYPTION)) 13146ddb2447STheodore Ts'o #else 13156ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (0) 13166ddb2447STheodore Ts'o #endif 1317bc0b0d6dSTheodore Ts'o 1318a2d4a646SJan Kara /* Number of quota types we support */ 1319689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1320a2d4a646SJan Kara 1321ca0faba0STheodore Ts'o /* 1322ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1323ca0faba0STheodore Ts'o */ 1324ca0faba0STheodore Ts'o struct ext4_sb_info { 1325ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1326ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1327ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1328281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1329ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1330ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1331ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1332ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1333ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1334fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1335952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1336281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1337281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1338ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1339ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1340ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 1341ca0faba0STheodore Ts'o struct buffer_head **s_group_desc; 13427f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1343a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 1344bc0b0d6dSTheodore Ts'o unsigned int s_mount_flags; 13455a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1346ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 134727dd4385SLukas Czerner atomic64_t s_resv_clusters; 134808cefc7aSEric W. Biederman kuid_t s_resuid; 134908cefc7aSEric W. Biederman kgid_t s_resgid; 1350ca0faba0STheodore Ts'o unsigned short s_mount_state; 1351ca0faba0STheodore Ts'o unsigned short s_pad; 1352ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1353ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1354ca0faba0STheodore Ts'o int s_inode_size; 1355ca0faba0STheodore Ts'o int s_first_ino; 1356ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 135711013911SAndreas Dilger unsigned int s_inode_goal; 1358ca0faba0STheodore Ts'o spinlock_t s_next_gen_lock; 1359ca0faba0STheodore Ts'o u32 s_next_generation; 1360ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1361ca0faba0STheodore Ts'o int s_def_hash_version; 1362ca0faba0STheodore Ts'o int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 136357042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1364ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1365ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 136657042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1367ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1368ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1369ca0faba0STheodore Ts'o struct kobject s_kobj; 1370ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 13712c0544b2STheodore Ts'o struct super_block *s_sb; 1372ca0faba0STheodore Ts'o 1373ca0faba0STheodore Ts'o /* Journaling */ 1374ca0faba0STheodore Ts'o struct journal_s *s_journal; 1375ca0faba0STheodore Ts'o struct list_head s_orphan; 1376ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 13779549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 1378ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1379ca0faba0STheodore Ts'o u32 s_max_batch_time; 1380ca0faba0STheodore Ts'o u32 s_min_batch_time; 1381ca0faba0STheodore Ts'o struct block_device *journal_bdev; 1382ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 1383a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; /* Names of quota files with journalled quota */ 1384ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1385ca0faba0STheodore Ts'o #endif 1386ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 13876fd058f7STheodore Ts'o struct rb_root system_blks; 1388ca0faba0STheodore Ts'o 1389ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1390ca0faba0STheodore Ts'o /* ext4 extents stats */ 1391ca0faba0STheodore Ts'o unsigned long s_ext_min; 1392ca0faba0STheodore Ts'o unsigned long s_ext_max; 1393ca0faba0STheodore Ts'o unsigned long s_depth_max; 1394ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1395ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1396ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1397ca0faba0STheodore Ts'o #endif 1398ca0faba0STheodore Ts'o 1399ca0faba0STheodore Ts'o /* for buddy allocator */ 1400ca0faba0STheodore Ts'o struct ext4_group_info ***s_group_info; 1401ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1402ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1403ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1404ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 140528623c2fSTheodore Ts'o unsigned int s_group_info_size; 1406d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1407a0154344SDaeho Jeong struct list_head s_freed_data_list; /* List of blocks to be freed 1408a0154344SDaeho Jeong after commit completed */ 1409ca0faba0STheodore Ts'o 1410ca0faba0STheodore Ts'o /* tunables */ 1411ca0faba0STheodore Ts'o unsigned long s_stripe; 1412ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1413ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1414ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1415ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1416ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1417ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 1418df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1419ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1420ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1421ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1422ca0faba0STheodore Ts'o 1423ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1424ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1425ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1426ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1427ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1428ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1429ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1430ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1431ca0faba0STheodore Ts'o spinlock_t s_bal_lock; 1432ca0faba0STheodore Ts'o unsigned long s_mb_buddies_generated; 1433ca0faba0STheodore Ts'o unsigned long long s_mb_generation_time; 1434ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1435ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1436ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 143750797481STheodore Ts'o atomic_t s_lock_busy; 1438ca0faba0STheodore Ts'o 1439ca0faba0STheodore Ts'o /* locality groups */ 1440003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1441ca0faba0STheodore Ts'o 1442ca0faba0STheodore Ts'o /* for write statistics */ 1443ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1444ca0faba0STheodore Ts'o u64 s_kbytes_written; 1445ca0faba0STheodore Ts'o 144667a5da56SZheng Liu /* the size of zero-out chunk */ 144767a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 144867a5da56SZheng Liu 1449ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 1450ca0faba0STheodore Ts'o struct flex_groups *s_flex_groups; 1451117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 14524c0425ffSMingming Cao 14532e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 14542e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 145566e61a9eSTheodore Ts'o 145666e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 145766e61a9eSTheodore Ts'o struct timer_list s_err_report; 1458bfff6873SLukas Czerner 1459bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1460bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1461bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1462bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1463c5e06d10SJohann Lombardi 1464c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1465c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 14663d56b8d2STao Ma 14673d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 14683d56b8d2STao Ma atomic_t s_last_trim_minblks; 14690441984aSDarrick J. Wong 14700441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 14710441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1472a9c47317SDarrick J. Wong 1473a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1474a9c47317SDarrick J. Wong __u32 s_csum_seed; 147574cd15cdSZheng Liu 147674cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 147774cd15cdSZheng Liu struct shrinker s_es_shrinker; 1478dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1479edaa53caSZheng Liu long s_es_nr_inode; 1480eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 148147387409STahsin Erdogan struct mb_cache *s_ea_block_cache; 1482dec214d0STahsin Erdogan struct mb_cache *s_ea_inode_cache; 1483edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1484efbed4dcSTheodore Ts'o 1485efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1486efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1487efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1488efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 1489c8585c6fSDaeho Jeong 1490c8585c6fSDaeho Jeong /* Barrier between changing inodes' journal flags and writepages ops. */ 1491c8585c6fSDaeho Jeong struct percpu_rw_semaphore s_journal_flag_rwsem; 14925e405595SDan Williams struct dax_device *s_daxdev; 1493ca0faba0STheodore Ts'o }; 1494ca0faba0STheodore Ts'o 14953dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 14963dcf5451SChristoph Hellwig { 14973dcf5451SChristoph Hellwig return sb->s_fs_info; 14983dcf5451SChristoph Hellwig } 14993dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 15003dcf5451SChristoph Hellwig { 15013dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 15023dcf5451SChristoph Hellwig } 15033dcf5451SChristoph Hellwig 15043dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 15053dcf5451SChristoph Hellwig { 15063dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 15077c319d32SAditya Kali ino == EXT4_USR_QUOTA_INO || 15087c319d32SAditya Kali ino == EXT4_GRP_QUOTA_INO || 1509393d1d1dSDr. Tilmann Bubeck ino == EXT4_BOOT_LOADER_INO || 15103dcf5451SChristoph Hellwig ino == EXT4_JOURNAL_INO || 15113dcf5451SChristoph Hellwig ino == EXT4_RESIZE_INO || 15123dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 15133dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 15143dcf5451SChristoph Hellwig } 151519f5fb7aSTheodore Ts'o 151619f5fb7aSTheodore Ts'o /* 151719f5fb7aSTheodore Ts'o * Inode dynamic state flags 151819f5fb7aSTheodore Ts'o */ 151919f5fb7aSTheodore Ts'o enum { 152019f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 152119f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 152219f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 152319f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 152419f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 152519f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 152619f5fb7aSTheodore Ts'o EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ 152714ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 152817335dccSDmitry Monakhov EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read 152917335dccSDmitry Monakhov nolocking */ 153067cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 15317869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 1532a6d05676STahsin Erdogan EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ 153319f5fb7aSTheodore Ts'o }; 153419f5fb7aSTheodore Ts'o 1535353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 153612e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 153712e9b892SDmitry Monakhov { \ 1538353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 153912e9b892SDmitry Monakhov } \ 154012e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 154112e9b892SDmitry Monakhov { \ 1542353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 154312e9b892SDmitry Monakhov } \ 154412e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 154512e9b892SDmitry Monakhov { \ 1546353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 154719f5fb7aSTheodore Ts'o } 154819f5fb7aSTheodore Ts'o 15493f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15503f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15513f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 15523f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 15533f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1554353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 15553f61c0ccSAndreas Dilger 15563f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15573f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15583f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 15593f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 15603f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1561353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1562353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1563353eb83cSTheodore Ts'o 1564353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1565353eb83cSTheodore Ts'o { 1566353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1567353eb83cSTheodore Ts'o } 1568353eb83cSTheodore Ts'o #else 1569353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1570353eb83cSTheodore Ts'o 1571353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1572353eb83cSTheodore Ts'o { 1573353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1574353eb83cSTheodore Ts'o } 1575353eb83cSTheodore Ts'o #endif 15763dcf5451SChristoph Hellwig #else 15773dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 15783dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 15793dcf5451SChristoph Hellwig * macros from user land. */ 15803dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 15813dcf5451SChristoph Hellwig #endif 15823dcf5451SChristoph Hellwig 1583b30ab0e0SMichael Halcrow /* 1584b30ab0e0SMichael Halcrow * Returns true if the inode is inode is encrypted 1585b30ab0e0SMichael Halcrow */ 15863dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 15873dcf5451SChristoph Hellwig 15883dcf5451SChristoph Hellwig /* 15893dcf5451SChristoph Hellwig * Codes for operating systems 15903dcf5451SChristoph Hellwig */ 15913dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 15923dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 15933dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 15943dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 15953dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 15963dcf5451SChristoph Hellwig 15973dcf5451SChristoph Hellwig /* 15983dcf5451SChristoph Hellwig * Revision levels 15993dcf5451SChristoph Hellwig */ 16003dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 16013dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 16023dcf5451SChristoph Hellwig 16033dcf5451SChristoph Hellwig #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV 16043dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 16053dcf5451SChristoph Hellwig 16063dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 16073dcf5451SChristoph Hellwig 16083dcf5451SChristoph Hellwig /* 16093dcf5451SChristoph Hellwig * Feature set definitions 16103dcf5451SChristoph Hellwig */ 16113dcf5451SChristoph Hellwig 16123dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 16133dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 16143dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 16153dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 16163dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 16173dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 16181beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 16193dcf5451SChristoph Hellwig 16203dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 16213dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 16223dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 16233dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 16243dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 16253dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 16263dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1627ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1628281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1629e6153918SDarrick J. Wong /* 1630e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1631e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1632e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1633e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1634e6153918SDarrick J. Wong */ 16359b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 16362cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 16378b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 16383dcf5451SChristoph Hellwig 16393dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 16403dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 16413dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 16423dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 16433dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 16443dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 16453dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 16463dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 16473dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1648f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1649f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 16508c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 16519b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 165267cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 16533edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 16543dcf5451SChristoph Hellwig 1655e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ 1656e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1657e2b911c5SDarrick J. Wong { \ 1658e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1659e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ 1660e2b911c5SDarrick J. Wong } \ 1661e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1662e2b911c5SDarrick J. Wong { \ 1663e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat |= \ 1664e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1665e2b911c5SDarrick J. Wong } \ 1666e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1667e2b911c5SDarrick J. Wong { \ 1668e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat &= \ 1669e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1670e2b911c5SDarrick J. Wong } 1671e2b911c5SDarrick J. Wong 1672e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ 1673e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1674e2b911c5SDarrick J. Wong { \ 1675e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1676e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ 1677e2b911c5SDarrick J. Wong } \ 1678e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1679e2b911c5SDarrick J. Wong { \ 1680e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ 1681e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1682e2b911c5SDarrick J. Wong } \ 1683e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1684e2b911c5SDarrick J. Wong { \ 1685e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ 1686e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1687e2b911c5SDarrick J. Wong } 1688e2b911c5SDarrick J. Wong 1689e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 1690e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1691e2b911c5SDarrick J. Wong { \ 1692e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1693e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 1694e2b911c5SDarrick J. Wong } \ 1695e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1696e2b911c5SDarrick J. Wong { \ 1697e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 1698e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1699e2b911c5SDarrick J. Wong } \ 1700e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1701e2b911c5SDarrick J. Wong { \ 1702e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 1703e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1704e2b911c5SDarrick J. Wong } 1705e2b911c5SDarrick J. Wong 1706e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 1707e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 1708e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 1709e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 1710e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 1711e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 1712e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 1713e2b911c5SDarrick J. Wong 1714e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 1715e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 1716e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 1717e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 1718e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 1719e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 1720e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 1721e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 1722e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 1723e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 1724e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 1725e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 1726e2b911c5SDarrick J. Wong 1727e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 1728e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 1729e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 1730e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 1731e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 1732e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 1733e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 1734e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 1735e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 1736e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 1737e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 1738e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 1739e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 1740e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 1741e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 1742e2b911c5SDarrick J. Wong 17432035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17442035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17452035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17462035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17472035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17482035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17492035e776STheodore Ts'o 17502035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17512035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17522035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 17532035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17542035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17552035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17562035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17572035e776STheodore Ts'o 1758e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17593dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17603dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 17613dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 17623dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 17633dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 1764c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 1765e50e5129SAndreas Dilger EXT4_FEATURE_INCOMPAT_EA_INODE| \ 1766f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 17676ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 17688c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 1769e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 1770e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_LARGEDIR) 17713dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17723dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17733dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 17743dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 17753dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 17763dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 17776f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 1778e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 17797c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 1780040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 1781040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT) 17823dcf5451SChristoph Hellwig 1783e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 1784e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 1785e2b911c5SDarrick J. Wong { \ 1786e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1787e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 1788e2b911c5SDarrick J. Wong } \ 1789e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 1790e2b911c5SDarrick J. Wong { \ 1791e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1792e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 1793e2b911c5SDarrick J. Wong } \ 1794e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 1795e2b911c5SDarrick J. Wong { \ 1796e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1797e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 1798e2b911c5SDarrick J. Wong } 1799e2b911c5SDarrick J. Wong 1800e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 1801e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 1802e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 1803e2b911c5SDarrick J. Wong 1804e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 1805e2b911c5SDarrick J. Wong { 1806e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 1807e2b911c5SDarrick J. Wong } 1808e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 1809e2b911c5SDarrick J. Wong { 1810e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 1811e2b911c5SDarrick J. Wong } 1812e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 1813e2b911c5SDarrick J. Wong { 1814e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 1815e2b911c5SDarrick J. Wong } 1816e2b911c5SDarrick J. Wong 18173dcf5451SChristoph Hellwig /* 18189549a168STheodore Ts'o * Superblock flags 18199549a168STheodore Ts'o */ 18209549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 18210db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 18220db1ff22STheodore Ts'o 18230db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 18240db1ff22STheodore Ts'o { 18250db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 18260db1ff22STheodore Ts'o } 18279549a168STheodore Ts'o 18289549a168STheodore Ts'o 18299549a168STheodore Ts'o /* 18303dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 18313dcf5451SChristoph Hellwig */ 18323dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 18333dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 18343dcf5451SChristoph Hellwig 1835040cb378SLi Xi /* 1836040cb378SLi Xi * Default project ID 1837040cb378SLi Xi */ 1838040cb378SLi Xi #define EXT4_DEF_PROJID 0 1839040cb378SLi Xi 1840240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 1841240799cdSTheodore Ts'o 18423dcf5451SChristoph Hellwig /* 18433dcf5451SChristoph Hellwig * Default mount options 18443dcf5451SChristoph Hellwig */ 18453dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 18463dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 18473dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 18483dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 18493dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 18503dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 18513dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 18523dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 18533dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 18548b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 18558b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 18568b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 18578b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 18583dcf5451SChristoph Hellwig 18593dcf5451SChristoph Hellwig /* 186030773840STheodore Ts'o * Default journal batch times 186130773840STheodore Ts'o */ 186230773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 186330773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 186430773840STheodore Ts'o 186530773840STheodore Ts'o /* 1866a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 1867a4912123STheodore Ts'o * directories into the first block group of a flexgroup 1868a4912123STheodore Ts'o */ 1869a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 1870a4912123STheodore Ts'o 1871a4912123STheodore Ts'o /* 18723dcf5451SChristoph Hellwig * Structure of a directory entry 18733dcf5451SChristoph Hellwig */ 18743dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 18753dcf5451SChristoph Hellwig 18763dcf5451SChristoph Hellwig struct ext4_dir_entry { 18773dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 18783dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 18793dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 18803dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 18813dcf5451SChristoph Hellwig }; 18823dcf5451SChristoph Hellwig 18833dcf5451SChristoph Hellwig /* 18843dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 18853dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 18863dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 18873dcf5451SChristoph Hellwig * file_type field. 18883dcf5451SChristoph Hellwig */ 18893dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 18903dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 18913dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 18923dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 18933dcf5451SChristoph Hellwig __u8 file_type; 18943dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 18953dcf5451SChristoph Hellwig }; 18963dcf5451SChristoph Hellwig 18973dcf5451SChristoph Hellwig /* 1898e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 1899e6153918SDarrick J. Wong * records checksums. 1900e6153918SDarrick J. Wong */ 1901e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 1902e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 1903e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 1904e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 1905e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 1906e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 1907e6153918SDarrick J. Wong }; 1908e6153918SDarrick J. Wong 19093c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 19103c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 19113c47d541STao Ma ((blocksize) - \ 19123c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 19133c47d541STao Ma 1914e6153918SDarrick J. Wong /* 19153dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 19163dcf5451SChristoph Hellwig * other bits are reserved for now. 19173dcf5451SChristoph Hellwig */ 19183dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 19193dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 19203dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 19213dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 19223dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 19233dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 19243dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 19253dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 19263dcf5451SChristoph Hellwig 19273dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 19283dcf5451SChristoph Hellwig 1929e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 1930e6153918SDarrick J. Wong 19313dcf5451SChristoph Hellwig /* 19323dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 19333dcf5451SChristoph Hellwig * 19343dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 19353dcf5451SChristoph Hellwig */ 19363dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 19373dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 19383dcf5451SChristoph Hellwig #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 19393dcf5451SChristoph Hellwig ~EXT4_DIR_ROUND) 19403dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 19413dcf5451SChristoph Hellwig 19423dcf5451SChristoph Hellwig /* 19430cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 19440cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 19450cfc9255SEric Sandeen */ 19460cfc9255SEric Sandeen static inline unsigned int 19470cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 19480cfc9255SEric Sandeen { 19490cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 19500cfc9255SEric Sandeen 1951ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19520cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 19530cfc9255SEric Sandeen return blocksize; 19540cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 19550cfc9255SEric Sandeen #else 19560cfc9255SEric Sandeen return len; 19570cfc9255SEric Sandeen #endif 19580cfc9255SEric Sandeen } 19590cfc9255SEric Sandeen 19600cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 19610cfc9255SEric Sandeen { 19620cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 19630cfc9255SEric Sandeen BUG(); 1964ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19650cfc9255SEric Sandeen if (len < 65536) 19660cfc9255SEric Sandeen return cpu_to_le16(len); 19670cfc9255SEric Sandeen if (len == blocksize) { 19680cfc9255SEric Sandeen if (blocksize == 65536) 19690cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 19700cfc9255SEric Sandeen else 19710cfc9255SEric Sandeen return cpu_to_le16(0); 19720cfc9255SEric Sandeen } 19730cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 19740cfc9255SEric Sandeen #else 19750cfc9255SEric Sandeen return cpu_to_le16(len); 19760cfc9255SEric Sandeen #endif 19770cfc9255SEric Sandeen } 19780cfc9255SEric Sandeen 19790cfc9255SEric Sandeen /* 19803dcf5451SChristoph Hellwig * Hash Tree Directory indexing 19813dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 19823dcf5451SChristoph Hellwig */ 19833dcf5451SChristoph Hellwig 1984e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 198512e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 1986c7414892SAndreas Dilger #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ 1987c7414892SAndreas Dilger !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) 19883dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 19893dcf5451SChristoph Hellwig 19903dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 19913dcf5451SChristoph Hellwig 19923dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 19933dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 19943dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 1995f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 1996f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 1997f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 19983dcf5451SChristoph Hellwig 19990441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 20000441984aSDarrick J. Wong const void *address, unsigned int length) 20010441984aSDarrick J. Wong { 20020441984aSDarrick J. Wong struct { 20030441984aSDarrick J. Wong struct shash_desc shash; 20043108b54bSTheodore Ts'o char ctx[4]; 20050441984aSDarrick J. Wong } desc; 20060441984aSDarrick J. Wong int err; 20070441984aSDarrick J. Wong 20083108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 20093108b54bSTheodore Ts'o 20100441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 20110441984aSDarrick J. Wong desc.shash.flags = 0; 20120441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 20130441984aSDarrick J. Wong 20140441984aSDarrick J. Wong err = crypto_shash_update(&desc.shash, address, length); 20150441984aSDarrick J. Wong BUG_ON(err); 20160441984aSDarrick J. Wong 20170441984aSDarrick J. Wong return *(u32 *)desc.ctx; 20180441984aSDarrick J. Wong } 20190441984aSDarrick J. Wong 20203dcf5451SChristoph Hellwig #ifdef __KERNEL__ 20213dcf5451SChristoph Hellwig 20223dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 20233dcf5451SChristoph Hellwig struct dx_hash_info 20243dcf5451SChristoph Hellwig { 20253dcf5451SChristoph Hellwig u32 hash; 20263dcf5451SChristoph Hellwig u32 minor_hash; 20273dcf5451SChristoph Hellwig int hash_version; 20283dcf5451SChristoph Hellwig u32 *seed; 20293dcf5451SChristoph Hellwig }; 20303dcf5451SChristoph Hellwig 2031d1f5273eSFan Yong 2032d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2033d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2034d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2035d1f5273eSFan Yong 20363dcf5451SChristoph Hellwig 20373dcf5451SChristoph Hellwig /* 20383dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 20393dcf5451SChristoph Hellwig */ 20403dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 20413dcf5451SChristoph Hellwig 20425b643f9cSTheodore Ts'o struct ext4_filename { 20435b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2044a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 20455b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 20465b643f9cSTheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 2047a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 20485b643f9cSTheodore Ts'o #endif 20495b643f9cSTheodore Ts'o }; 20505b643f9cSTheodore Ts'o 20515b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 20525b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 20533dcf5451SChristoph Hellwig 20543dcf5451SChristoph Hellwig /* 20553dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 20563dcf5451SChristoph Hellwig */ 20573dcf5451SChristoph Hellwig struct ext4_iloc 20583dcf5451SChristoph Hellwig { 20593dcf5451SChristoph Hellwig struct buffer_head *bh; 20603dcf5451SChristoph Hellwig unsigned long offset; 20613dcf5451SChristoph Hellwig ext4_group_t block_group; 20623dcf5451SChristoph Hellwig }; 20633dcf5451SChristoph Hellwig 20643dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 20653dcf5451SChristoph Hellwig { 20663dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 20673dcf5451SChristoph Hellwig } 20683dcf5451SChristoph Hellwig 2069dec214d0STahsin Erdogan static inline bool ext4_is_quota_file(struct inode *inode) 2070dec214d0STahsin Erdogan { 2071dec214d0STahsin Erdogan return IS_NOQUOTA(inode) && 2072dec214d0STahsin Erdogan !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); 2073dec214d0STahsin Erdogan } 207402749a4cSTahsin Erdogan 20753dcf5451SChristoph Hellwig /* 20763dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 20773dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 20783dcf5451SChristoph Hellwig * readdir operations in hash tree order. 20793dcf5451SChristoph Hellwig */ 20803dcf5451SChristoph Hellwig struct dir_private_info { 20813dcf5451SChristoph Hellwig struct rb_root root; 20823dcf5451SChristoph Hellwig struct rb_node *curr_node; 20833dcf5451SChristoph Hellwig struct fname *extra_fname; 20843dcf5451SChristoph Hellwig loff_t last_pos; 20853dcf5451SChristoph Hellwig __u32 curr_hash; 20863dcf5451SChristoph Hellwig __u32 curr_minor_hash; 20873dcf5451SChristoph Hellwig __u32 next_hash; 20883dcf5451SChristoph Hellwig }; 20893dcf5451SChristoph Hellwig 20903dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 20913dcf5451SChristoph Hellwig static inline ext4_fsblk_t 20923dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 20933dcf5451SChristoph Hellwig { 20943dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 20953dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 20963dcf5451SChristoph Hellwig } 20973dcf5451SChristoph Hellwig 20983dcf5451SChristoph Hellwig /* 20993dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 21003dcf5451SChristoph Hellwig */ 210136de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 21023dcf5451SChristoph Hellwig 2103e08ac99fSArtem Blagodarenko /* htree levels for ext4 */ 2104e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL_COMPAT 2 2105e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL 3 2106e08ac99fSArtem Blagodarenko 2107e08ac99fSArtem Blagodarenko static inline int ext4_dir_htree_level(struct super_block *sb) 2108e08ac99fSArtem Blagodarenko { 2109e08ac99fSArtem Blagodarenko return ext4_has_feature_largedir(sb) ? 2110e08ac99fSArtem Blagodarenko EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; 2111e08ac99fSArtem Blagodarenko } 2112e08ac99fSArtem Blagodarenko 21133dcf5451SChristoph Hellwig /* 2114bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2115bfff6873SLukas Czerner */ 2116bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2117bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2118bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2119bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2120bfff6873SLukas Czerner 2121bfff6873SLukas Czerner /* 2122bfff6873SLukas Czerner * Lazy inode table initialization info 2123bfff6873SLukas Czerner */ 2124bfff6873SLukas Czerner struct ext4_lazy_init { 2125bfff6873SLukas Czerner unsigned long li_state; 2126bfff6873SLukas Czerner struct list_head li_request_list; 2127bfff6873SLukas Czerner struct mutex li_list_mtx; 2128bfff6873SLukas Czerner }; 2129bfff6873SLukas Czerner 2130bfff6873SLukas Czerner struct ext4_li_request { 2131bfff6873SLukas Czerner struct super_block *lr_super; 2132bfff6873SLukas Czerner struct ext4_sb_info *lr_sbi; 2133bfff6873SLukas Czerner ext4_group_t lr_next_group; 2134bfff6873SLukas Czerner struct list_head lr_request; 2135bfff6873SLukas Czerner unsigned long lr_next_sched; 2136bfff6873SLukas Czerner unsigned long lr_timeout; 2137bfff6873SLukas Czerner }; 2138bfff6873SLukas Czerner 2139857ac889SLukas Czerner struct ext4_features { 2140857ac889SLukas Czerner struct kobject f_kobj; 2141857ac889SLukas Czerner struct completion f_kobj_unregister; 2142857ac889SLukas Czerner }; 2143857ac889SLukas Czerner 2144bfff6873SLukas Czerner /* 2145c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2146c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2147c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2148c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2149c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2150c5e06d10SJohann Lombardi */ 2151c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2152c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2153c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2154c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2155c5e06d10SJohann Lombardi 2156c5e06d10SJohann Lombardi struct mmp_struct { 2157c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2158c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2159c5e06d10SJohann Lombardi 2160c5e06d10SJohann Lombardi /* 2161c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2162c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2163c5e06d10SJohann Lombardi */ 2164c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2165c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2166c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2167c5e06d10SJohann Lombardi 2168c5e06d10SJohann Lombardi /* 2169c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2170c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2171c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2172c5e06d10SJohann Lombardi */ 2173c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2174c5e06d10SJohann Lombardi 2175c5e06d10SJohann Lombardi __le16 mmp_pad1; 2176e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2177e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2178c5e06d10SJohann Lombardi }; 2179c5e06d10SJohann Lombardi 2180c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2181c5e06d10SJohann Lombardi struct mmpd_data { 2182c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2183c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2184c5e06d10SJohann Lombardi }; 2185c5e06d10SJohann Lombardi 2186c5e06d10SJohann Lombardi /* 2187c5e06d10SJohann Lombardi * Check interval multiplier 2188c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2189c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2190c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2191c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2192c5e06d10SJohann Lombardi * in use. 2193c5e06d10SJohann Lombardi */ 2194c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2195c5e06d10SJohann Lombardi 2196c5e06d10SJohann Lombardi /* 2197c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2198c5e06d10SJohann Lombardi */ 2199c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2200c5e06d10SJohann Lombardi 2201c5e06d10SJohann Lombardi /* 2202c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2203c5e06d10SJohann Lombardi */ 2204c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2205c5e06d10SJohann Lombardi 2206c5e06d10SJohann Lombardi /* 22073dcf5451SChristoph Hellwig * Function prototypes 22083dcf5451SChristoph Hellwig */ 22093dcf5451SChristoph Hellwig 22103dcf5451SChristoph Hellwig /* 22113dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 22123dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 22133dcf5451SChristoph Hellwig */ 22143dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 22153dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 22163dcf5451SChristoph Hellwig # define NORET_AND noreturn, 22173dcf5451SChristoph Hellwig 2218498e5f24STheodore Ts'o /* bitmap.c */ 2219f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 222041a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 222141a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 222241a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 222341a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 222441a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 222541a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2226fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2227fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 222879f1ba49STao Ma struct buffer_head *bh); 2229fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2230fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 223179f1ba49STao Ma struct buffer_head *bh); 2232498e5f24STheodore Ts'o 22333dcf5451SChristoph Hellwig /* balloc.c */ 2234bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2235bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2236bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2237bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2238bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2239bd86298eSLukas Czerner ext4_fsblk_t block); 2240bd86298eSLukas Czerner 22413dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 22423dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22433dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 22443dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22453dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 22463dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 22473dcf5451SChristoph Hellwig ext4_group_t group); 22487061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 224955f020dbSAllison Henderson ext4_fsblk_t goal, 225055f020dbSAllison Henderson unsigned int flags, 225155f020dbSAllison Henderson unsigned long *count, 225255f020dbSAllison Henderson int *errp); 2253e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2254e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 22555dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 22563dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 22573dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 22583dcf5451SChristoph Hellwig ext4_group_t block_group, 22593dcf5451SChristoph Hellwig struct buffer_head ** bh); 22603dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2261813e5727STheodore Ts'o 2262813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2263813e5727STheodore Ts'o ext4_group_t block_group); 2264813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2265813e5727STheodore Ts'o ext4_group_t block_group, 2266813e5727STheodore Ts'o struct buffer_head *bh); 2267813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2268bb23c20aSTheodore Ts'o ext4_group_t block_group); 2269cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2270fd034a84STheodore Ts'o ext4_group_t block_group, 2271fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2272f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 22733dcf5451SChristoph Hellwig 2274a7550b30SJaegeuk Kim static inline bool ext4_encrypted_inode(struct inode *inode) 2275d5d0e8c7SMichael Halcrow { 2276a7550b30SJaegeuk Kim return ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT); 2277d5d0e8c7SMichael Halcrow } 2278a7550b30SJaegeuk Kim 2279a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 2280a7550b30SJaegeuk Kim static inline int ext4_fname_setup_filename(struct inode *dir, 2281a7550b30SJaegeuk Kim const struct qstr *iname, 2282a7550b30SJaegeuk Kim int lookup, struct ext4_filename *fname) 2283a7550b30SJaegeuk Kim { 2284a7550b30SJaegeuk Kim struct fscrypt_name name; 2285a7550b30SJaegeuk Kim int err; 2286a7550b30SJaegeuk Kim 2287a7550b30SJaegeuk Kim memset(fname, 0, sizeof(struct ext4_filename)); 2288a7550b30SJaegeuk Kim 2289a7550b30SJaegeuk Kim err = fscrypt_setup_filename(dir, iname, lookup, &name); 2290a7550b30SJaegeuk Kim 2291a7550b30SJaegeuk Kim fname->usr_fname = name.usr_fname; 2292a7550b30SJaegeuk Kim fname->disk_name = name.disk_name; 2293a7550b30SJaegeuk Kim fname->hinfo.hash = name.hash; 2294a7550b30SJaegeuk Kim fname->hinfo.minor_hash = name.minor_hash; 2295a7550b30SJaegeuk Kim fname->crypto_buf = name.crypto_buf; 2296a7550b30SJaegeuk Kim return err; 2297a7550b30SJaegeuk Kim } 2298a7550b30SJaegeuk Kim 2299a7550b30SJaegeuk Kim static inline void ext4_fname_free_filename(struct ext4_filename *fname) 2300a7550b30SJaegeuk Kim { 2301a7550b30SJaegeuk Kim struct fscrypt_name name; 2302a7550b30SJaegeuk Kim 2303a7550b30SJaegeuk Kim name.crypto_buf = fname->crypto_buf; 2304a7550b30SJaegeuk Kim fscrypt_free_filename(&name); 2305a7550b30SJaegeuk Kim 2306a7550b30SJaegeuk Kim fname->crypto_buf.name = NULL; 2307a7550b30SJaegeuk Kim fname->usr_fname = NULL; 2308a7550b30SJaegeuk Kim fname->disk_name.name = NULL; 2309a7550b30SJaegeuk Kim } 2310a7550b30SJaegeuk Kim #else 23115b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 23125b643f9cSTheodore Ts'o const struct qstr *iname, 23135b643f9cSTheodore Ts'o int lookup, struct ext4_filename *fname) 23145b643f9cSTheodore Ts'o { 23155b643f9cSTheodore Ts'o fname->usr_fname = iname; 23165b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 23175b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 23185b643f9cSTheodore Ts'o return 0; 23195b643f9cSTheodore Ts'o } 23205b643f9cSTheodore Ts'o static inline void ext4_fname_free_filename(struct ext4_filename *fname) { } 2321a7550b30SJaegeuk Kim 2322d5d0e8c7SMichael Halcrow #endif 2323d5d0e8c7SMichael Halcrow 23243dcf5451SChristoph Hellwig /* dir.c */ 232560fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2326f7c21177STheodore Ts'o struct file *, 23273dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2328226ba972STao Ma struct buffer_head *, char *, int, 2329226ba972STao Ma unsigned int); 2330226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2331f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2332226ba972STao Ma (de), (bh), (buf), (size), (offset))) 23333dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 23343dcf5451SChristoph Hellwig __u32 minor_hash, 23352f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2336a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 23373dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2338978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2339978fef91STao Ma struct buffer_head *bh, 2340978fef91STao Ma void *buf, int buf_size, 23415b643f9cSTheodore Ts'o struct ext4_filename *fname, 2342978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 23431bc0af60SEric Biggers void ext4_insert_dentry(struct inode *inode, 2344978fef91STao Ma struct ext4_dir_entry_2 *de, 2345978fef91STao Ma int buf_size, 23465b643f9cSTheodore Ts'o struct ext4_filename *fname); 2347978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2348978fef91STao Ma { 2349e2b911c5SDarrick J. Wong if (!ext4_has_feature_dir_index(inode->i_sb)) 2350978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2351978fef91STao Ma } 2352d6006186SEric Biggers static const unsigned char ext4_filetype_table[] = { 235365d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 235465d165d9STao Ma }; 235565d165d9STao Ma 235665d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 235765d165d9STao Ma { 2358e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 235965d165d9STao Ma return DT_UNKNOWN; 236065d165d9STao Ma 236165d165d9STao Ma return ext4_filetype_table[filetype]; 236265d165d9STao Ma } 236340b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 236440b163f1SDarrick J. Wong void *buf, int buf_size); 23653dcf5451SChristoph Hellwig 23663dcf5451SChristoph Hellwig /* fsync.c */ 236702c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 23683dcf5451SChristoph Hellwig 23693dcf5451SChristoph Hellwig /* hash.c */ 23703dcf5451SChristoph Hellwig extern int ext4fs_dirhash(const char *name, int len, struct 23713dcf5451SChristoph Hellwig dx_hash_info *hinfo); 23723dcf5451SChristoph Hellwig 23733dcf5451SChristoph Hellwig /* ialloc.c */ 23741139575aSTheodore Ts'o extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, 23755cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 23761b917ed8STahsin Erdogan uid_t *owner, __u32 i_flags, 23771b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 23781b917ed8STahsin Erdogan int nblocks); 23791139575aSTheodore Ts'o 23801b917ed8STahsin Erdogan #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ 23811139575aSTheodore Ts'o __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ 23821b917ed8STahsin Erdogan i_flags, 0, 0, 0) 23831139575aSTheodore Ts'o #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ 23841139575aSTheodore Ts'o type, nblocks) \ 23851139575aSTheodore Ts'o __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ 23861b917ed8STahsin Erdogan 0, (type), __LINE__, (nblocks)) 23871139575aSTheodore Ts'o 23881139575aSTheodore Ts'o 23893dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 23903dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 23913dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 23923dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 23933dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 239461d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2395bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2396bfff6873SLukas Czerner ext4_group_t group, int barrier); 2397813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 23983dcf5451SChristoph Hellwig 23993dcf5451SChristoph Hellwig /* mballoc.c */ 2400ebd173beSTheodore Ts'o extern const struct file_operations ext4_seq_mb_groups_fops; 24013dcf5451SChristoph Hellwig extern long ext4_mb_stats; 24023dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 24039d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 24043dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 24053dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 24063dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 24073dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 2408c2ea3fdeSTheodore Ts'o extern void ext4_discard_preallocations(struct inode *); 24095dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 24105dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 241144338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2412e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2413e6362609STheodore Ts'o unsigned long count, int flags); 241428623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 241528623c2fSTheodore Ts'o ext4_group_t ngroups); 2416920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 24175f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2418cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 24192846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 24207360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 2421a0154344SDaeho Jeong extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); 24227360d173SLukas Czerner 24233dcf5451SChristoph Hellwig /* inode.c */ 2424f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 242510560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 24261c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 24279699d4f9STahsin Erdogan int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, 24289699d4f9STahsin Erdogan bool wait, struct buffer_head **bhs); 2429705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2430f19d5870STao Ma struct buffer_head *bh_result, int create); 24316873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 24326873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 2433705965bdSJan Kara int ext4_dio_get_block(struct inode *inode, sector_t iblock, 2434705965bdSJan Kara struct buffer_head *bh_result, int create); 24359c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 24369c3569b5STao Ma struct buffer_head *bh, int create); 2437f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2438f19d5870STao Ma struct buffer_head *head, 2439f19d5870STao Ma unsigned from, 2440f19d5870STao Ma unsigned to, 2441f19d5870STao Ma int *partial, 2442f19d5870STao Ma int (*fn)(handle_t *handle, 2443f19d5870STao Ma struct buffer_head *bh)); 2444f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2445f19d5870STao Ma struct buffer_head *bh); 24469c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 24479c3569b5STao Ma #define CONVERT_INLINE_DATA 2 24483dcf5451SChristoph Hellwig 24493dcf5451SChristoph Hellwig extern struct inode *ext4_iget(struct super_block *, unsigned long); 2450f4bb2981STheodore Ts'o extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); 2451a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 24523dcf5451SChristoph Hellwig extern int ext4_setattr(struct dentry *, struct iattr *); 2453a528d35eSDavid Howells extern int ext4_getattr(const struct path *, struct kstat *, u32, unsigned int); 24540930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 24550930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 245699652ea5SDavid Howells extern int ext4_file_getattr(const struct path *, struct kstat *, u32, unsigned int); 24573dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2458aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 24593dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 24603dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 2461a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 246291ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 24632c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2464aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2465487caeefSJan Kara extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); 24663dcf5451SChristoph Hellwig extern void ext4_set_inode_flags(struct inode *); 2467ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 24683dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 24693dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2470f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2471a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2472a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 247311bac800SDave Jiang extern int ext4_page_mkwrite(struct vm_fault *vmf); 247411bac800SDave Jiang extern int ext4_filemap_fault(struct vm_fault *vmf); 2475a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 2476040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 24775f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 24785f634d06SAneesh Kumar K.V int used, int quota_claim); 247953085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 248053085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 2481dae1e52cSAmir Goldstein 2482dae1e52cSAmir Goldstein /* indirect.c */ 2483dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2484dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 2485dae1e52cSAmir Goldstein extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); 2486fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2487819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 24884f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 24894f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2490ff9893dcSAmir Goldstein 24913dcf5451SChristoph Hellwig /* ioctl.c */ 24923dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 24933dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 24943dcf5451SChristoph Hellwig 24953dcf5451SChristoph Hellwig /* migrate.c */ 24962a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 24970d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 24983d0518f4SWei Yongjun 24993dcf5451SChristoph Hellwig /* namei.c */ 2500b0336e8dSDarrick J. Wong extern int ext4_dirent_csum_verify(struct inode *inode, 2501b0336e8dSDarrick J. Wong struct ext4_dir_entry *dirent); 25023dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 25033dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 25043dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 25053dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 25065b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 25077335cd3bSTao Ma char *search_buf, 25087335cd3bSTao Ma int buf_size, 25097335cd3bSTao Ma struct inode *dir, 25105b643f9cSTheodore Ts'o struct ext4_filename *fname, 25117335cd3bSTao Ma unsigned int offset, 25127335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 251305019a9eSTao Ma extern int ext4_generic_delete_entry(handle_t *handle, 251405019a9eSTao Ma struct inode *dir, 251505019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 251605019a9eSTao Ma struct buffer_head *bh, 251705019a9eSTao Ma void *entry_buf, 251805019a9eSTao Ma int buf_size, 251905019a9eSTao Ma int csum_size); 2520a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 25213dcf5451SChristoph Hellwig 25223dcf5451SChristoph Hellwig /* resize.c */ 25233dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 25243dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 25253dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 25263dcf5451SChristoph Hellwig struct ext4_super_block *es, 25273dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 252819c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 25293dcf5451SChristoph Hellwig 25303dcf5451SChristoph Hellwig /* super.c */ 2531ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 2532952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 253306db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 25349933fc0aSTheodore Ts'o extern void *ext4_kvmalloc(size_t size, gfp_t flags); 25359933fc0aSTheodore Ts'o extern void *ext4_kvzalloc(size_t size, gfp_t flags); 2536117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 2537117fff10STheodore Ts'o ext4_group_t ngroup); 2538722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 2539722887ddSTheodore Ts'o char nbuf[16]); 2540e7c96e8eSJoe Perches 2541b9075fa9SJoe Perches extern __printf(4, 5) 2542b9075fa9SJoe Perches void __ext4_error(struct super_block *, const char *, unsigned int, 2543b9075fa9SJoe Perches const char *, ...); 2544b9075fa9SJoe Perches extern __printf(5, 6) 2545e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, 2546b9075fa9SJoe Perches const char *, ...); 2547b9075fa9SJoe Perches extern __printf(5, 6) 2548e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 2549b9075fa9SJoe Perches const char *, ...); 2550c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 2551c398eda0STheodore Ts'o unsigned int, int); 2552b9075fa9SJoe Perches extern __printf(4, 5) 2553b9075fa9SJoe Perches void __ext4_abort(struct super_block *, const char *, unsigned int, 2554b9075fa9SJoe Perches const char *, ...); 2555b9075fa9SJoe Perches extern __printf(4, 5) 2556b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 2557b9075fa9SJoe Perches const char *, ...); 2558b03a2f7eSAndreas Dilger extern __printf(4, 5) 2559b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 2560b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 2561b9075fa9SJoe Perches extern __printf(3, 4) 2562e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 2563c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 2564c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 2565b9075fa9SJoe Perches extern __printf(7, 8) 2566b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 2567b9075fa9SJoe Perches struct super_block *, ext4_group_t, 2568b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 2569b9075fa9SJoe Perches const char *, ...); 2570e7c96e8eSJoe Perches 2571b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 2572b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 2573b03a2f7eSAndreas Dilger 2574b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ 2575b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) 2576b03a2f7eSAndreas Dilger 2577b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 2578b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 2579b03a2f7eSAndreas Dilger 2580e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 2581e7c96e8eSJoe Perches 2582e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2583e7c96e8eSJoe Perches __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__) 2584e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2585e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 2586e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2587e7c96e8eSJoe Perches __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2588e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2589e7c96e8eSJoe Perches __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2590e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2591e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2592b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2593b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 2594e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2595e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 2596e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2597e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 2598e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2599e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 2600e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 2601e7c96e8eSJoe Perches 2602e7c96e8eSJoe Perches #else 2603e7c96e8eSJoe Perches 2604e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2605e7c96e8eSJoe Perches do { \ 2606e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2607e7c96e8eSJoe Perches __ext4_error_inode(inode, "", 0, block, " "); \ 2608e7c96e8eSJoe Perches } while (0) 2609e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2610e7c96e8eSJoe Perches do { \ 2611e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2612e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 2613e7c96e8eSJoe Perches } while (0) 2614e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2615e7c96e8eSJoe Perches do { \ 2616e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2617e7c96e8eSJoe Perches __ext4_error(sb, "", 0, " "); \ 2618e7c96e8eSJoe Perches } while (0) 2619e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2620e7c96e8eSJoe Perches do { \ 2621e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2622e7c96e8eSJoe Perches __ext4_abort(sb, "", 0, " "); \ 2623e7c96e8eSJoe Perches } while (0) 2624e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2625e7c96e8eSJoe Perches do { \ 2626e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2627e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 2628e7c96e8eSJoe Perches } while (0) 2629b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2630b03a2f7eSAndreas Dilger do { \ 2631b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 2632b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 2633b03a2f7eSAndreas Dilger } while (0) 2634e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2635e7c96e8eSJoe Perches do { \ 2636e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2637e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 2638e7c96e8eSJoe Perches } while (0) 2639e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2640e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 2641e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2642e7c96e8eSJoe Perches do { \ 2643e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2644e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 2645e7c96e8eSJoe Perches } while (0) 2646e7c96e8eSJoe Perches 2647e7c96e8eSJoe Perches #endif 2648e7c96e8eSJoe Perches 26493dcf5451SChristoph Hellwig extern void ext4_update_dynamic_rev(struct super_block *sb); 26503dcf5451SChristoph Hellwig extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, 26513dcf5451SChristoph Hellwig __u32 compat); 26523dcf5451SChristoph Hellwig extern int ext4_update_rocompat_feature(handle_t *handle, 26533dcf5451SChristoph Hellwig struct super_block *sb, __u32 rocompat); 26543dcf5451SChristoph Hellwig extern int ext4_update_incompat_feature(handle_t *handle, 26553dcf5451SChristoph Hellwig struct super_block *sb, __u32 incompat); 26563dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 26573dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26583dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 26593dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26603dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 26613dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 2662021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 2663560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2664560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 2665560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2666560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 2667560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2668560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 2669560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 26703dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 26713dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26723dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 26733dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26743dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 26753dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 2676021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 2677021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 2678021b65bbSTheodore Ts'o __u32 count); 2679560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 2680560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2681560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 2682560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2683560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 2684560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2685feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 2686bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 2687feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 2688bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 26897f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 26907f511862STheodore Ts'o ext4_group_t first_not_zeroed); 26913dcf5451SChristoph Hellwig 26929aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 26939aa5d32bSDmitry Monakhov { 2694e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 26959aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 26969aa5d32bSDmitry Monakhov 2697dec214d0STahsin Erdogan return ext4_has_feature_metadata_csum(sb) && 2698dec214d0STahsin Erdogan (EXT4_SB(sb)->s_chksum_driver != NULL); 26999aa5d32bSDmitry Monakhov } 2700dec214d0STahsin Erdogan 2701dec214d0STahsin Erdogan static inline int ext4_has_group_desc_csum(struct super_block *sb) 2702dec214d0STahsin Erdogan { 2703dec214d0STahsin Erdogan return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); 2704dec214d0STahsin Erdogan } 2705dec214d0STahsin Erdogan 27063dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 27073dcf5451SChristoph Hellwig { 27083dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | 27093dcf5451SChristoph Hellwig le32_to_cpu(es->s_blocks_count_lo); 27103dcf5451SChristoph Hellwig } 27113dcf5451SChristoph Hellwig 27123dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 27133dcf5451SChristoph Hellwig { 27143dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | 27153dcf5451SChristoph Hellwig le32_to_cpu(es->s_r_blocks_count_lo); 27163dcf5451SChristoph Hellwig } 27173dcf5451SChristoph Hellwig 27183dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 27193dcf5451SChristoph Hellwig { 27203dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | 27213dcf5451SChristoph Hellwig le32_to_cpu(es->s_free_blocks_count_lo); 27223dcf5451SChristoph Hellwig } 27233dcf5451SChristoph Hellwig 27243dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 27253dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27263dcf5451SChristoph Hellwig { 27273dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 27283dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 27293dcf5451SChristoph Hellwig } 27303dcf5451SChristoph Hellwig 27313dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 27323dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27333dcf5451SChristoph Hellwig { 27343dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 27353dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 27363dcf5451SChristoph Hellwig } 27373dcf5451SChristoph Hellwig 27383dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 27393dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27403dcf5451SChristoph Hellwig { 27413dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 27423dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 27433dcf5451SChristoph Hellwig } 27443dcf5451SChristoph Hellwig 2745e08ac99fSArtem Blagodarenko static inline loff_t ext4_isize(struct super_block *sb, 2746e08ac99fSArtem Blagodarenko struct ext4_inode *raw_inode) 27473dcf5451SChristoph Hellwig { 2748e08ac99fSArtem Blagodarenko if (ext4_has_feature_largedir(sb) || 2749e08ac99fSArtem Blagodarenko S_ISREG(le16_to_cpu(raw_inode->i_mode))) 27503dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 27513dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 2752e08ac99fSArtem Blagodarenko 275306a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 27543dcf5451SChristoph Hellwig } 27553dcf5451SChristoph Hellwig 27563dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 27573dcf5451SChristoph Hellwig { 27583dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 27593dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 27603dcf5451SChristoph Hellwig } 27613dcf5451SChristoph Hellwig 27623dcf5451SChristoph Hellwig static inline 27633dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 27643dcf5451SChristoph Hellwig ext4_group_t group) 27653dcf5451SChristoph Hellwig { 27663dcf5451SChristoph Hellwig struct ext4_group_info ***grp_info; 27673dcf5451SChristoph Hellwig long indexv, indexh; 27682f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 27693dcf5451SChristoph Hellwig grp_info = EXT4_SB(sb)->s_group_info; 27703dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 27713dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 27723dcf5451SChristoph Hellwig return grp_info[indexv][indexh]; 27733dcf5451SChristoph Hellwig } 27743dcf5451SChristoph Hellwig 27758df9675fSTheodore Ts'o /* 27768df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 27778df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 27788df9675fSTheodore Ts'o * in resize.c 27798df9675fSTheodore Ts'o */ 27808df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 27818df9675fSTheodore Ts'o { 27828df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 27838df9675fSTheodore Ts'o 27848df9675fSTheodore Ts'o smp_rmb(); 27858df9675fSTheodore Ts'o return ngroups; 27868df9675fSTheodore Ts'o } 27873dcf5451SChristoph Hellwig 2788772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 2789772cb7c8SJose R. Santos ext4_group_t block_group) 2790772cb7c8SJose R. Santos { 2791772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 2792772cb7c8SJose R. Santos } 2793772cb7c8SJose R. Santos 2794772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 2795772cb7c8SJose R. Santos { 2796772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 2797772cb7c8SJose R. Santos } 2798772cb7c8SJose R. Santos 27993dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 28003dcf5451SChristoph Hellwig do { \ 28013dcf5451SChristoph Hellwig if ((errno)) \ 2802c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 28033dcf5451SChristoph Hellwig } while (0) 28043dcf5451SChristoph Hellwig 2805a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 2806df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 2807df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 2808179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 2809a30d542aSAneesh Kumar K.V */ 2810df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 2811a30d542aSAneesh Kumar K.V #else 2812df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 2813a30d542aSAneesh Kumar K.V #endif 2814a30d542aSAneesh Kumar K.V 281590e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 2816cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 2817cf17fea6SAneesh Kumar K.V { 281890e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 28195955102cSAl Viro !inode_is_locked(inode)); 2820cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 2821cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 2822cf17fea6SAneesh Kumar K.V EXT4_I(inode)->i_disksize = newsize; 2823cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 282490e775b7SJan Kara } 282590e775b7SJan Kara 28264631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 28274631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 28284631dbf6SDmitry Monakhov { 28294631dbf6SDmitry Monakhov int changed = 0; 28304631dbf6SDmitry Monakhov 28314631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 28324631dbf6SDmitry Monakhov i_size_write(inode, newsize); 28334631dbf6SDmitry Monakhov changed = 1; 28344631dbf6SDmitry Monakhov } 28354631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 28364631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 28374631dbf6SDmitry Monakhov changed |= 2; 28384631dbf6SDmitry Monakhov } 28394631dbf6SDmitry Monakhov return changed; 28404631dbf6SDmitry Monakhov } 28414631dbf6SDmitry Monakhov 284201127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 284301127848SJan Kara loff_t len); 284401127848SJan Kara 28455d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 28465d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 28475d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 2848a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 2849a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 2850a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 28518a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 28525d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 28535d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 28545d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 28555d1b1b3fSAneesh Kumar K.V #endif 28565d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 2857a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 2858a36b4498SEric Sandeen * regions, index is order. 2859a36b4498SEric Sandeen * bb_counters[3] = 5 means 2860a36b4498SEric Sandeen * 5 free 8-block regions. */ 28615d1b1b3fSAneesh Kumar K.V }; 28625d1b1b3fSAneesh Kumar K.V 28635d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 28643d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 2865163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 286687a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 28675d1b1b3fSAneesh Kumar K.V 28685d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 28695d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 2870163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 2871163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 287287a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 287387a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 28745d1b1b3fSAneesh Kumar K.V 28753d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 28763d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28773d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 28783d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28793d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 28803d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28813d56b8d2STao Ma 288250797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 288350797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 288450797481STheodore Ts'o 2885955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 2886955ce5f5SAneesh Kumar K.V ext4_group_t group) 2887955ce5f5SAneesh Kumar K.V { 2888955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 2889955ce5f5SAneesh Kumar K.V } 2890955ce5f5SAneesh Kumar K.V 289150797481STheodore Ts'o /* 289250797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 289350797481STheodore Ts'o * access the block group locks has run into contention. 289450797481STheodore Ts'o */ 289550797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 289650797481STheodore Ts'o { 289750797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 289850797481STheodore Ts'o } 289950797481STheodore Ts'o 29005d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 29015d1b1b3fSAneesh Kumar K.V { 290250797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 290350797481STheodore Ts'o if (spin_trylock(lock)) 290450797481STheodore Ts'o /* 290550797481STheodore Ts'o * We're able to grab the lock right away, so drop the 290650797481STheodore Ts'o * lock contention counter. 290750797481STheodore Ts'o */ 290850797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 290950797481STheodore Ts'o else { 291050797481STheodore Ts'o /* 291150797481STheodore Ts'o * The lock is busy, so bump the contention counter, 291250797481STheodore Ts'o * and then wait on the spin lock. 291350797481STheodore Ts'o */ 291450797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 291550797481STheodore Ts'o EXT4_MAX_CONTENTION); 291650797481STheodore Ts'o spin_lock(lock); 291750797481STheodore Ts'o } 29185d1b1b3fSAneesh Kumar K.V } 29195d1b1b3fSAneesh Kumar K.V 29205d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 29215d1b1b3fSAneesh Kumar K.V ext4_group_t group) 29225d1b1b3fSAneesh Kumar K.V { 2923955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 29245d1b1b3fSAneesh Kumar K.V } 29255d1b1b3fSAneesh Kumar K.V 29263dcf5451SChristoph Hellwig /* 29271f7d1e77STheodore Ts'o * Block validity checking 29281f7d1e77STheodore Ts'o */ 29291f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 29301f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29311f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 29321f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 29331f7d1e77STheodore Ts'o 29341f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 29351f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29361f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 29371f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 29381f7d1e77STheodore Ts'o 29391f7d1e77STheodore Ts'o /* 29403dcf5451SChristoph Hellwig * Inodes and files operations 29413dcf5451SChristoph Hellwig */ 29423dcf5451SChristoph Hellwig 29433dcf5451SChristoph Hellwig /* dir.c */ 29443dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 29453dcf5451SChristoph Hellwig 29463dcf5451SChristoph Hellwig /* file.c */ 29473dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 29483dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 2949e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 29503dcf5451SChristoph Hellwig 295195eaefbdSTheodore Ts'o /* inline.c */ 295295eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 295395eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 295495eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 295595eaefbdSTheodore Ts'o unsigned int len); 295695eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 295795eaefbdSTheodore Ts'o 295895eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 295995eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 296095eaefbdSTheodore Ts'o struct inode *inode, 296195eaefbdSTheodore Ts'o loff_t pos, unsigned len, 296295eaefbdSTheodore Ts'o unsigned flags, 296395eaefbdSTheodore Ts'o struct page **pagep); 296495eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 296595eaefbdSTheodore Ts'o loff_t pos, unsigned len, 296695eaefbdSTheodore Ts'o unsigned copied, 296795eaefbdSTheodore Ts'o struct page *page); 296895eaefbdSTheodore Ts'o extern struct buffer_head * 296995eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 297095eaefbdSTheodore Ts'o unsigned len, 297195eaefbdSTheodore Ts'o struct page *page); 297295eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 297395eaefbdSTheodore Ts'o struct inode *inode, 297495eaefbdSTheodore Ts'o loff_t pos, unsigned len, 297595eaefbdSTheodore Ts'o unsigned flags, 297695eaefbdSTheodore Ts'o struct page **pagep, 297795eaefbdSTheodore Ts'o void **fsdata); 297895eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 297995eaefbdSTheodore Ts'o unsigned len, unsigned copied, 298095eaefbdSTheodore Ts'o struct page *page); 29815b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 29825b643f9cSTheodore Ts'o struct ext4_filename *fname, 298356a04915STheodore Ts'o struct inode *dir, struct inode *inode); 298495eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 298595eaefbdSTheodore Ts'o struct inode *parent, 298695eaefbdSTheodore Ts'o struct inode *inode); 298795eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 2988725bebb2SAl Viro struct dir_context *ctx, 298995eaefbdSTheodore Ts'o int *has_inline_data); 29908af0f082STao Ma extern int htree_inlinedir_to_tree(struct file *dir_file, 29918af0f082STao Ma struct inode *dir, ext4_lblk_t block, 29928af0f082STao Ma struct dx_hash_info *hinfo, 29938af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 29948af0f082STao Ma int *has_inline_data); 299595eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 29965b643f9cSTheodore Ts'o struct ext4_filename *fname, 299795eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 299895eaefbdSTheodore Ts'o int *has_inline_data); 299995eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 300095eaefbdSTheodore Ts'o struct inode *dir, 300195eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 300295eaefbdSTheodore Ts'o struct buffer_head *bh, 300395eaefbdSTheodore Ts'o int *has_inline_data); 3004a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 300595eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 300695eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 300795eaefbdSTheodore Ts'o int *retval); 300895eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 300995eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3010d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 30117046ae35SAndreas Gruenbacher 30127046ae35SAndreas Gruenbacher struct iomap; 30137046ae35SAndreas Gruenbacher extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap); 30147046ae35SAndreas Gruenbacher 301595eaefbdSTheodore Ts'o extern int ext4_try_to_evict_inline_data(handle_t *handle, 301695eaefbdSTheodore Ts'o struct inode *inode, 301795eaefbdSTheodore Ts'o int needed); 301801daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 301995eaefbdSTheodore Ts'o 302095eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 302195eaefbdSTheodore Ts'o 302283447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 302383447ccbSZheng Liu { 302483447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 302583447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 302683447ccbSZheng Liu } 302783447ccbSZheng Liu 30283dcf5451SChristoph Hellwig /* namei.c */ 30293dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 30303dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3031596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3032a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3033a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3034a774f9c2STao Ma int blocksize, int csum_size, 3035a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 30363c47d541STao Ma extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, 30373c47d541STao Ma unsigned int blocksize); 30383c47d541STao Ma extern int ext4_handle_dirty_dirent_node(handle_t *handle, 30393c47d541STao Ma struct inode *inode, 30403c47d541STao Ma struct buffer_head *bh); 30418af0f082STao Ma #define S_SHIFT 12 3042381cebfeSDan Carpenter static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { 30438af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 30448af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 30458af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 30468af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 30478af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 30488af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 30498af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 30508af0f082STao Ma }; 30518af0f082STao Ma 30528af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 30538af0f082STao Ma struct ext4_dir_entry_2 *de, 30548af0f082STao Ma umode_t mode) { 3055e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 30568af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 30578af0f082STao Ma } 30588af0f082STao Ma 3059f64e02feSTheodore Ts'o /* readpages.c */ 3060f64e02feSTheodore Ts'o extern int ext4_mpage_readpages(struct address_space *mapping, 3061f64e02feSTheodore Ts'o struct list_head *pages, struct page *page, 3062f64e02feSTheodore Ts'o unsigned nr_pages); 30633dcf5451SChristoph Hellwig 30643dcf5451SChristoph Hellwig /* symlink.c */ 3065a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 30663dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 30673dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 30683dcf5451SChristoph Hellwig 3069b5799018STheodore Ts'o /* sysfs.c */ 3070b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3071ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3072b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3073b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3074b5799018STheodore Ts'o 30756fd058f7STheodore Ts'o /* block_validity */ 30766fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 30776fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 30785dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 30795dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 30806fd058f7STheodore Ts'o extern int ext4_data_block_valid(struct ext4_sb_info *sbi, 30816fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 30826fd058f7STheodore Ts'o unsigned int count); 30831f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 30841f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 30856fd058f7STheodore Ts'o 30863dcf5451SChristoph Hellwig /* extents.c */ 30874a092d73STheodore Ts'o struct ext4_ext_path; 30884a092d73STheodore Ts'o struct ext4_extent; 30894a092d73STheodore Ts'o 3090d7b2a00cSZheng Liu /* 3091d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3092d7b2a00cSZheng Liu * __le32. 3093d7b2a00cSZheng Liu */ 3094d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3095d7b2a00cSZheng Liu 30963dcf5451SChristoph Hellwig extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 30973dcf5451SChristoph Hellwig extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 3098fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3099e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3100e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3101d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 310226a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 310326a4c0c6STheodore Ts'o ext4_lblk_t end); 31043dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 31053dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 31062fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 31073dcf5451SChristoph Hellwig loff_t len); 31086b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 31096b523df4SJan Kara loff_t offset, ssize_t len); 3110e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3111e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 31124a092d73STheodore Ts'o extern int ext4_ext_calc_metadata_amount(struct inode *inode, 31134a092d73STheodore Ts'o ext4_lblk_t lblocks); 31144a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 31154a092d73STheodore Ts'o int num, 31164a092d73STheodore Ts'o struct ext4_ext_path *path); 31174a092d73STheodore Ts'o extern int ext4_can_extents_be_merged(struct inode *inode, 31184a092d73STheodore Ts'o struct ext4_extent *ex1, 31194a092d73STheodore Ts'o struct ext4_extent *ex2); 31204a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3121dfe50809STheodore Ts'o struct ext4_ext_path **, 31224a092d73STheodore Ts'o struct ext4_extent *, int); 3123ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3124705912caSTheodore Ts'o struct ext4_ext_path **, 3125107a7bd3STheodore Ts'o int flags); 31264a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 31274a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3128f7fec032SZheng Liu extern int ext4_find_delalloc_range(struct inode *inode, 3129f7fec032SZheng Liu ext4_lblk_t lblk_start, 3130f7fec032SZheng Liu ext4_lblk_t lblk_end); 31314a092d73STheodore Ts'o extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); 3132fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 31333a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 31343a06d778SAneesh Kumar K.V __u64 start, __u64 len); 31357869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 31369eb79482SNamjae Jeon extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len); 3137331573feSNamjae Jeon extern int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len); 3138fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3139fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3140fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3141fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 31424a092d73STheodore Ts'o 3143748de673SAkira Fujita /* move_extent.c */ 3144393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3145393d1d1dSDr. Tilmann Bubeck struct inode *second); 3146393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3147393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3148748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3149748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3150748de673SAkira Fujita __u64 len, __u64 *moved_len); 3151748de673SAkira Fujita 3152bd2d0210STheodore Ts'o /* page-io.c */ 31535dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 31545dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3155bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 315697a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 315797a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 315897a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 315997a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 316097a851edSJan Kara struct writeback_control *wbc); 31612e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3162bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3163bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3164bd2d0210STheodore Ts'o struct page *page, 3165bd2d0210STheodore Ts'o int len, 31661c8349a1SNamjae Jeon struct writeback_control *wbc, 31671c8349a1SNamjae Jeon bool keep_towrite); 31683a06d778SAneesh Kumar K.V 3169c5e06d10SJohann Lombardi /* mmp.c */ 3170c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3171c5e06d10SJohann Lombardi 31723613d228SJan Kara /* 317348fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 31742ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 31752ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 31762ccb5fb9SAneesh Kumar K.V */ 31772ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 31782ccb5fb9SAneesh Kumar K.V 31792ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 31802ccb5fb9SAneesh Kumar K.V { 31812ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 31822ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 31832ccb5fb9SAneesh Kumar K.V } 31842ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 31852ccb5fb9SAneesh Kumar K.V { 31862ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 31872ccb5fb9SAneesh Kumar K.V } 31882ccb5fb9SAneesh Kumar K.V 318917335dccSDmitry Monakhov /* 319017335dccSDmitry Monakhov * Disable DIO read nolock optimization, so new dioreaders will be forced 319117335dccSDmitry Monakhov * to grab i_mutex 319217335dccSDmitry Monakhov */ 319317335dccSDmitry Monakhov static inline void ext4_inode_block_unlocked_dio(struct inode *inode) 319417335dccSDmitry Monakhov { 319517335dccSDmitry Monakhov ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 319617335dccSDmitry Monakhov smp_mb(); 319717335dccSDmitry Monakhov } 319817335dccSDmitry Monakhov static inline void ext4_inode_resume_unlocked_dio(struct inode *inode) 319917335dccSDmitry Monakhov { 320017335dccSDmitry Monakhov smp_mb(); 320117335dccSDmitry Monakhov ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 320217335dccSDmitry Monakhov } 320317335dccSDmitry Monakhov 3204731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3205731eb1a0SAkinobu Mita 3206e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3207e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3208e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3209e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3210e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3211e9e3bcecSEric Sandeen 32128f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 32138f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 32148f82f840SYongqiang Yang 321574c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 321674c66bcbSJan Kara struct ext4_io_end *io_end) 321774c66bcbSJan Kara { 321874c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 321974c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 322074c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 322174c66bcbSJan Kara } 322274c66bcbSJan Kara } 322374c66bcbSJan Kara 322474c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 322574c66bcbSJan Kara { 322674c66bcbSJan Kara struct inode *inode = io_end->inode; 322774c66bcbSJan Kara 322874c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 322974c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 323074c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 323174c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 323274c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 323374c66bcbSJan Kara } 323474c66bcbSJan Kara } 323574c66bcbSJan Kara 32368ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 3237364443cbSJan Kara 32383dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 32393dcf5451SChristoph Hellwig 32406a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 32416a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 32426a797d27SDarrick J. Wong 32433dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3244